P1100 高低位交换

题目:

​​题目链接​​

题解:

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long x;
    cin>>x;
    cout<<((x&0x0000ffff)<<16|(x&0xffff0000)>>16)<<endl;
    return 0;
}