Submission #1000581

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Source Code Expand

#include <iostream>
#include <fstream>
#include <set>
#include <map>
#include <string>
#include <vector>
#include <bitset>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cmath>
#include <cassert>
#include <queue>

#define mp make_pair
#define pb push_back


typedef long long ll;
typedef long double ld;

using namespace std;

int n;
vector<pair<int, int> > vv;

const ll MOD = 1e9 + 7;


int main() {
	scanf("%d", &n);
	for (int i = 0; i < n; ++i) {
		int x;
		scanf("%d", &x);
		vv.push_back(make_pair(x, 0));
	}
	for (int i = 0; i < n; ++i) {
		int x;
		scanf("%d", &x);
		vv.push_back(make_pair(x, 1));
	}
	sort(vv.begin(), vv.end());
	int c = 0;
	ll ans = 1;
	for (int i = 0; i < (int)vv.size(); ++i) {
		if (vv[i].second == 0) {
			if (c < 0)
				ans = (ans * (-c)) % MOD;
			++c;
		}
		else {
			if (c > 0)
				ans = (ans * c) % MOD;
			--c;
		}
	}
	cout << ans << "\n";
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:31:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
./Main.cpp:34:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^
./Main.cpp:39:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &x);
                  ^

Judge Result