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

const string testName = "快读 (int, with return value)";
int a[N];

int read() {
	char ch = getchar();
	int ret = 0, f = 1;
	while(!isdigit(ch)) {
		if(ch == '-') f = -1;
		ch = getchar();
	}
	while(isdigit(ch)) {
		ret = ret*10+(ch & 15);
		ch = getchar();
	}
	return f*ret;
}

void Work() {
	freopen("in.txt", "r", stdin);
	for(int i = 0; i < N; ++i) {
		a[i] = read();
	}
}