#include<bits/stdc++.h>
using namespace std;
inline int read(){
int x=0,f=1;char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
return x*f;
}
int x,n,ans;
int main(){
ans=1^1;
cout<<1^1;
return 0;
}
}
求解QAQ(本人蒟蒻,大佬轻喷)