제출 #1346303

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1346303		msb.83	Kutije (COCI21_kutije)	C++20	0 / 70	49 ms	142812 KiB

Main

//Rahman ve Rahim olan Allah'ın adıyla
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define mid ((st+end)/2)
#define fi first
#define se second
const int INF=1e15+5;
const int E16=1e6;
const int ONE=1;
const int TWO=2;
const int ZERO=0;
const int MOD=1e9+7;//(x+MOD)%MOD
//el.erase(unique(el.begin(),el.end()),el.end());
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    #ifndef ONLINE_JUDGE
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif
    int n,m,qry,a;cin>>n>>m>>qry;vector<vector<int>>adj(n);
    while(m--){
        for(int i=0;i<n;i++){
            cin>>a;a--;if(a==i) continue;
            adj[a].pb(i);
        }
    }queue<int>q;vector<vector<bool>>vis(n,vector<bool>(n,false));
    for(int i=0;i<n;i++){
        q.push(i);
        while(!q.empty()){//cerr<<i<<" "<<q.front()<<"\n";
            if(vis[i][q.front()]){q.pop();continue;}//cerr<<"1";
            int cur=q.front();q.pop();/*cerr<<"1.1";*/vis[i][cur]=true;//cerr<<"2";
            for(auto go:adj[cur]){//cerr<<"3";
                if(vis[i][go]) continue;
            //cerr<<"4";
                q.push(go);//cerr<<"5";
            }
        }
    }int b;//cerr<<"not here";
    while(qry--){
        cin>>a>>b;a--;b--;
        if(vis[a][b]){
            cout<<"DA\n";
        }else{
            cout<<"NE\n";
        }
    }
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int32_t main()':
Main.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen("input.txt","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen("output.txt","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 35