”可你生于光明之下，不该为黑暗而死“

#include <bits/stdc++.h>
using namespace std;
inline int read() {
    int x = 0, f = 1;
	char ch = getchar();
    while (ch > '9' || ch < '0') {
		if(ch == '-')
			f = -f;
		ch = getchar();
	}
    while (ch >= '0' && ch <= '9') {
		x = x * 10 + ch - '0';
		ch = getchar();
	}
    return x * f;
}//快读
int main() {
	//ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	//freopen("E:\\in.txt","r",stdin);
	//freopen("E:\\out.txt","w",stdout);
	//fclose(stdin);
	//fclose(stdout);
	return 0;
}