Submission #534864

#	Time	Username	Problem	Language	Result	Execution time	Memory
534864		mjhmjh1104	Fancy Fence (CEOI20_fancyfence)	C++17	30 / 100	9 ms	4224 KiB

fancyfence

#include <cstdio>
#include <algorithm>
using namespace std;

const int MOD = 1e9 + 7;

int n, h[1006], w[1006], res, a[1006][1006];

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++) res = (res + 1LL * (1LL * w[i] * (w[i] + 1) / 2 % MOD) * (1LL * h[i] * (h[i] + 1) / 2 % MOD) % MOD) % MOD;
    for (int i = 0; i < n; i++) {
        a[i][i] = h[i];
        for (int j = i + 1; j < n; j++) a[i][j] = min(h[j], a[i][j - 1]);
    }
    for (int i = 0; i < n; i++) for (int j = i + 1; j < n; j++) res = (res + 1LL * w[i] * w[j] % MOD * (1LL * a[i][j] * (a[i][j] + 1) / 2 % MOD) % MOD) % MOD;
    printf("%d", res);
}

Compilation message (stderr)

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
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", h + i);
      |                                 ~~~~~^~~~~~~~~~~~~
fancyfence.cpp:12:38: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     for (int i = 0; i < n; i++) scanf("%d", w + i);
      |                                 ~~~~~^~~~~~~~~~~~~

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