제출 #473273

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
473273		BidoTeima	Usmjeri (COCI17_usmjeri)	C++17	0 / 140	116 ms	372 KiB

usmjeri

/// isA AC
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
void ACPLS(){
#ifndef ONLINE_JUDGE
    freopen("output.txt","w",stdout);
    freopen("input.txt","r",stdin);
#endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
#define tc int tttttt;cin>>tttttt;while(tttttt--)
#define sumrange(l,r,arr) (l==0?arr[r]:arr[r]-arr[l-1])
#define all(v) v.begin(),v.end()
int main(){
    ACPLS(); 
    int n,m;
    cin>>n>>m;
    for(int i = 0; i < n-1; i++){
        int a,b;
        cin>>a>>b;
    }
    for(int i = 0; i < m; i++){
        int a,b;
        cin>>a>>b;
    }
    ll ans=1;
    for(int i = 0; i < n-1; i++){
        ans=(ans*2)%int(1e9+7);
    }
    cout<<ans;
}

컴파일 시 표준 에러 (stderr) 메시지

usmjeri.cpp: In function 'void ACPLS()':
usmjeri.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     freopen("output.txt","w",stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
usmjeri.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen("input.txt","r",stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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