hdu 1418 欧拉定理

#include <iostream>
#include <cstring>
#include <algorithm>
#include <cstdio>

using namespace std;

int main ( )
{
    long long m , n;
    while ( scanf ( "%lld%lld" , &m , &n ) , m+n )
    {
        printf ( "%I64d\n" , n+m-2 );
    }
}