Submission #534863

#	Time	Username	Problem	Language	Result	Execution time	Memory
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);
}

Compilation message (stderr)

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);
      |                                 ~~~~~^~~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 0 / 12
• Subtask 3: 0 / 13
• Subtask 4: 15 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 18
• Subtask 7: 0 / 27