제출 #1289197

#제출 시각아이디문제언어결과실행 시간메모리
1289197daffuwuStar Trek (CEOI20_startrek)C++20
0 / 100
1 ms572 KiB
#include <bits/stdc++.h>
using namespace std;
#define fr first
#define sc second
//startrek

int n, u, v, ans;
long long d;
const int dv = 1e9+7;

int fe(int x, long long y)
{
    int res = 1;
    for (; y>0; y/=2)
    {
        if (y%2==1) res = 1ll*res*x%dv;
        x = 1ll*x*x%dv; 
    }
    return res;
}

int main()
{
    int i;
    scanf("%d%lld", &n, &d);
    for (i=1; i<=n-1; i++)
    {
        scanf("%d%d", &u, &v);
    }
    printf("%d\n", fe(2, d));
}

컴파일 시 표준 에러 (stderr) 메시지

startrek.cpp: In function 'int main()':
startrek.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |     scanf("%d%lld", &n, &d);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
startrek.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |         scanf("%d%d", &u, &v);
      |         ~~~~~^~~~~~~~~~~~~~~~
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