Submission #3513329

---

Source Code Expand

#include<bits/stdc++.h>
#define rint register int
#define rep(i,a,b) for (rint i=(a),_E=(b); i<=_E; ++i)
#define per(i,a,b) for (rint i=(a),_E=(b); i>=_E; --i)
#define REP(i,n) for (rint i=0,_E=(n); i<_E; ++i)
#define pb push_back
#define cmin(x,y) (y<x?x=y:0)
#define cmax(x,y) (y>x?x=y:0)
using namespace std;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef long long ll;

const int N = 100005;
const int mod = 1000000007;
int a[N], b[N], n, cur, ans = 1;

int main() {
	scanf("%d", &n);
	rep (i, 1, n) scanf("%d", &a[i]);
	rep (i, 1, n) scanf("%d", &b[i]);
	sort(a + 1, a + n + 1);
	sort(b + 1, b + n + 1);
	cur = 0;
	rep (i, 1, n) {
		while (cur < n && a[cur+1] < b[i]) ++ cur;
		if (cur > i) ans = 1ll * ans * (cur - i + 1) % mod;
	}
	swap(a, b);
	cur = 0;
	rep (i, 1, n) {
		while (cur < n && a[cur+1] < b[i]) ++ cur;
		if (cur > i) ans = 1ll * ans * (cur - i + 1) % mod;
	}
	printf("%d\n", ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:20:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  rep (i, 1, n) scanf("%d", &a[i]);
                                  ^
./Main.cpp:21:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  rep (i, 1, n) scanf("%d", &b[i]);
                                  ^

Judge Result