#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; } template<typename T> inline void write(T X){ if(X<0){ putchar('-');X=~(X-1);} int s[50],top=0; while(X){ s[++top]=X%10;X/=10;} if (!top) s[++top]=0; while(top) putchar(s[top--]+'0'); putchar('\n'); return; } int main(){ cout<<"NO"<<endl; return 0; }