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A A Very Hard Question#include<bits/stdc++.h> using namespace std; #define For(i,n) for(int i=1;i<=n;i++) #define Fork(i,k,n) for(int i=k;i<=n;i++) #define ForkD(i,k,n) for(int i=n;i>=k;i--) #define R

A#include<bits/stdc++.h> using namespace std; #define For(i,n) for(int i=1;i<=n;i++) #define Fork(i,k,n) for(int i=k;i<=n;i++) #define ForkD(i,k,n) for(int i=n;i>=k;i--) #define Rep(i,n) for(int i=0;i