ecnu 2951 Bit operation

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

const unsigned int u=2147483648;

int main(){
    unsigned int n;
    int m;
    cin>>n>>m;
    while(m--){
        if(n&1)n=(n>>1)|u;
        else n>>=1;
    }
    cout<<n;
}