[51nod] 2102 or minus and

Or minus and

Link

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Their thinking

Big problem , Than $a+bproblem$ Much more difficult （

code

#include<iostream>
#include<cstdio>
using namespace std;

int a,b;

int main()
{
    
	cin>>a>>b;
	cout<<(a|b)-(a&b)<<endl;
}