https://www.luogu.com.cn/record/90108104

#include<bits/stdc++.h>
using namespace std;
int main(){
	while(true){
		int the_CSP_is_too_hard;
		cin>>the_CSP_is_too_hard;
		if(the_CSP_is_too_hard!=42)cout<<the_CSP_is_too_hard<<endl;
		else break;
	}
	return 0;
}