ecnu 2019 Bit operation

#include<bits/stdc++.h>
using namespace std;

unsigned int encrypt(unsigned int x){
    unsigned int low=x>>16,up=x<<16;
    low=((~low)<<16)>>16;
    up=up^(low<<16);
    return low|up;
}

int main(){
    unsigned int u;
    while(~scanf("%d",&u)){
        printf("%.2X\n",encrypt(u));
    }
}