Submission #1480308

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

const int MOD = 1e9 + 7;
const int MAX = 1e5 + 10;
int n;
long long a[MAX], b[MAX];
pair<long long, bool> ab[MAX * 2];

int main() {
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
        scanf("%lld", a + i);
    }
    sort(a, a + n);
    for (int i = 0; i < n; i++) {
        scanf("%lld", b + i);
    }
    sort(b, b + n);
    long long ans = 1;

    for (int i = 0; i < n; i++) {
        ab[i] = make_pair(a[i], false);
    }
    for (int i = 0; i < n; i++) {
        ab[n + i] = make_pair(b[i], true);
    }
    sort(ab, ab + 2 * n);
    int cnt = 0;
    for (int i = 0; i < n * 2; i++) {
        if (ab[i].second) {
            // com
            if (cnt > 0) {
                (ans *= cnt) %= MOD;
            }
            cnt--;
        } else {
            // el
            if (cnt < 0) {
                (ans *= -cnt) %= MOD;
            }
            cnt++;
        }
    }

    printf("%d\n", ans);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:47:23: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=]
     printf("%d\n", ans);
                       ^
./Main.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
./Main.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld", a + i);
                             ^
./Main.cpp:18:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld", b + i);
                             ^

Judge Result