Submission #1000585

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <cstring>
#include <string>
#include <cmath>
#include <cstdlib>
#include <iostream>

using namespace std;

#define MOD 1000000007
#define ADD(X,Y) ((X) = ((X) + (Y)) % MOD)
typedef long long i64; typedef vector<int> ivec; typedef vector<string> svec;

int N, A[101010], B[101010];

int main()
{
	scanf("%d", &N);
	for (int i = 0; i < N; ++i) scanf("%d", A + i);
	for (int i = 0; i < N; ++i) scanf("%d", B + i);

	vector<pair<int, int> > eve;
	for (int i = 0; i < N; ++i) {
		eve.push_back({ A[i], 0 });
	}
	for (int i = 0; i < N; ++i) {
		eve.push_back({ B[i], 0 });
	}
	sort(eve.begin(), eve.end());

	i64 ret = 1;
	int ch = 0;

	for (auto e : eve) {
		int ki = e.second;
		if (ki == 1) {
			if (ch < 0) ret = ret * (-ch) % MOD;
			++ch;
		} else {
			if (ch > 0) ret = ret * ch % MOD;
			--ch;
		}

	}

	printf("%lld\n", ret);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:24:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
                 ^
./Main.cpp:25:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 0; i < N; ++i) scanf("%d", A + i);
                                                ^
./Main.cpp:26:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 0; i < N; ++i) scanf("%d", B + i);
                                                ^

Judge Result