1294 - positive negative sign.cpp

#include<iostream>
#include<cstdio>
using namespace std;
#define ull				unsigned long long
#define ll				long long
#define ul				unsigned long
#define min(a,b)		((a)<(b)?(a):(b))
#define max(a,b)		((a)>(b)?(a):(b))
#define pi				acos(-1.0)
#define mod				10000000007

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(false);

	return 0;
}