제출 #1348305

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1348305		msb.83	Currents (EGOI25_currents)	C++20	0 / 100	79 ms	242588 KiB

Main

//Rahman ve Rahim olan Allah'ın adıyla
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define fi first
#define se second
#define mid (st+end)/2
using namespace std;
const int INF=1e18+5;
const int ONE=1;
vector<int>bounds(1);
int32_t main(){
    ios_base::sync_with_stdio(false);cin.tie(0);
    freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
    int n,m,a,b;cin>>n>>m;vector<vector<int>>adj(n);vector<vector<int>>adjr(n);
    for(int i=0;i<m;i++){cin>>a>>b;adj[a].pb(b);adjr[b].pb(a);}
    vector<int>deps(n,-1);queue<int>q;q.push(0);deps[0]=0;
    while(!q.empty()){
        if(!deps[q.front()]==-1){q.pop();continue;}
        int nd=q.front();q.pop();
        for(auto it:adj[nd]){
            if(deps[it]!=-1) continue;
            deps[it]=deps[nd]+1;q.push(it);
        }
    }
    vector<int>res(n,INF);priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>>pq;vector<bool>vis(n);vis[n-1]=true;
    for(auto it:adjr[n-1]){
        res[it]=max(deps[it],ONE);pq.push({res[it],it});
    }while(!pq.empty()){if(vis[pq.top().se]){pq.pop();continue;}
        int nd=pq.top().se,dep=pq.top().fi;pq.pop();vis[nd]=true;
        for(auto it:adjr[nd]){
            if(vis[it]) continue;
            if(res[it]>res[nd]+1){
                res[it]=res[nd]+1;pq.push({res[it],it});
            }
        }
    }
    for(int i=0;i<n-1;i++){
        cout<<res[i]<<" ";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int32_t main()':
Main.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:15:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
      |                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
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