Submission #1000595

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

const int md = 1000000007;

const int N = 1234567;

pair <int, int> a[N];

int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n + n; i++) {
    scanf("%d", &a[i].first);
    a[i].second = i;
  }
  sort(a, a + n + n);
  int ans = 1;
  int balance = 0;
  for (int i = 0; i < n + n; i++) {
    if (a[i].second < n) {
      if (balance < 0) {
        ans = (long long) ans * (-balance) % md;
      }
      balance++;
    } else {
      if (balance > 0) {
        ans = (long long) ans * balance % md;
      }
      balance--;
    }
  }
  printf("%d\n", ans);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^
./Main.cpp:15:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &a[i].first);
                             ^

Judge Result