Submission #1833217

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int N = (int)1e5 + 7;
const int mod = (int)1e9 + 7;

int a[N], b[N];
int dp[N];
ll ans = 1;

main() {
    int n; scanf ("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf ("%d", a + i);
    }
    for (int i = 1; i <= n; i++) {
        scanf ("%d", b + i);
    }
    sort(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);

    for (int i = 1; i <= n; i++) {
        int l = i, r = n;
        int q = i;
        while (r - l > 1) {
            int mid = (l + r) / 2;
            if (a[mid] <= b[i]) {
                l = mid;
                q = mid;
            } else {
                r = mid;
            }
        }
        if (a[r] <= b[i]) q = r;
        l = i, r = n;
        int p = i;
        while (r - l > 1) {
            int mid = (l + r) / 2;
            if (b[mid] <= a[i]) {
                l = mid;
                p = mid;
            } else {
                r = mid;
            }
        }
        if (b[r] <= a[i]) p = r;
        ans *= (max(p, q) - i + 1);
        ans %= mod;
    }
    printf ("%lld", ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:15:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     int n; scanf ("%d", &n);
                            ^
./Main.cpp:17:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d", a + i);
                            ^
./Main.cpp:20:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d", b + i);
                            ^

Judge Result