제출 #1096683

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1096683		nguyenvu	Railway (BOI17_railway)	C++14	0 / 100	2 ms	1628 KiB

railway

#include<bits/stdc++.h>
#define ll long long
#define endl "\n"
#define FILE "SUADUONG"
using namespace std;
int n,m,k;
vector<int> a[50005];

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    freopen(FILE".inp","r",stdin);
    freopen(FILE".out","w",stdout);
    cin>>n>>m>>k;
    for(int i=1;i<n;i++){
        int u,v;
        cin>>u>>v;
        a[u].push_back(v);
        a[v].push_back(u);
    }
    while(m--){
        int x;
        cin>>x;
        for(int i=1;i<=x;i++){
            int y;
            cin>>y;
        }
    }
    cout<<0;
}

컴파일 시 표준 에러 (stderr) 메시지

railway.cpp: In function 'int main()':
railway.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen(FILE".inp","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
railway.cpp:13:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |     freopen(FILE".out","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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