Submission #1017315

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define FOR(i,l,r) for(int i = (l);i < (r);i++)
#define ALL(x) (x).begin(),(x).end()
template<typename T> bool chmax(T& a,const T& b){return a < b ? (a = b,true) : false;}
template<typename T> bool chmin(T& a,const T& b){return b < a ? (a = b,true) : false;}
typedef long long ll;

int N;
const int MAX_N = 1e5;
const ll MOD = 1e9 + 7;

int main()
{
	scanf("%d",&N);
	vector< pair<int,bool> > A(N * 2);
	FOR(i,0,N){
		scanf("%d",&A [i].first);
		A [i].second = true;
	}
	FOR(i,0,N){
		scanf("%d",&A [i + N].first);
	}
	sort(ALL(A));

	ll ans = 1,cnt = 0;
	FOR(i,0,N * 2){
		if(A [i].second){
			if(cnt < 0){
				(ans *= abs(cnt)) %= MOD;
			}
			cnt++;
		}
		else{
			if(cnt > 0){
				(ans *= abs(cnt)) %= MOD;
			}
			cnt--;
		}
	}

	printf("%lld\n",ans);

	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:16:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
                ^
./Main.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&A [i].first);
                           ^
./Main.cpp:23:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&A [i + N].first);
                               ^

Judge Result