Submission #1131256

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Source Code Expand

#include <cstdio>
using namespace std;
constexpr int mod = 1000000007;
int a[100000];
int main() {
    int n;
    scanf("%d", &n);
    for(int i = 0; i < n; i++)
        scanf("%d", a + i);
    int ans = 1;
    for(int i = 0, j = 0; i < n; i++) {
        while(j + 1 < n && a[j] >= 2 * (j - i) + 1)
            j++;
        // fprintf(stderr, "j=%d i=%d\n", j, i);
        ans = 1LL * ans * (j - i + 1) % mod;
    }
    printf("%d\n", ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
./Main.cpp:9:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", a + i);
                           ^

Judge Result