제출 #534863

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
534863		mjhmjh1104	Fancy Fence (CEOI20_fancyfence)	C++17	15 / 100	29 ms	1040 KiB

fancyfence

#include <cstdio>

const int MOD = 1e9 + 7;

int n, h[100006], w[100006];
long long W;

int main() {
    scanf("%d", &n);
    for (int i = 0; i < n; i++) scanf("%d", h + i);
    for (int i = 0; i < n; i++) scanf("%d", w + i);
    for (int i = 0; i < n; i++) W = (W + w[i]) % MOD;
    printf("%lld", 1LL * (1LL * W * (W + 1) / 2 % MOD) * (1LL * h[0] * (h[0] + 1) / 2 % MOD) % MOD);
}

컴파일 시 표준 에러 (stderr) 메시지

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
fancyfence.cpp:10:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     for (int i = 0; i < n; i++) scanf("%d", h + i);
      |                                 ~~~~~^~~~~~~~~~~~~
fancyfence.cpp:11:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     for (int i = 0; i < n; i++) scanf("%d", w + i);
      |                                 ~~~~~^~~~~~~~~~~~~

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