Zadanie ze SPOJ-a. Żegnaj lato na rok

#include <iostream>
using namespace std;
unsigned int NWD( unsigned int x, unsigned int y )
{
    while( x != y )
    {
        if( x > y ) x -= y;
        else y -= x;
       
    }
    return x;
}
unsigned int NWW( unsigned int v, unsigned int z )
{
    return( v * z ) / NWD( v, z );
}
int main()
{
   
    unsigned int a, b, c;
    cin >> a >> b >> c;
    unsigned int n, m, x = 0, k = 0;
    while( cin >> n )
    {
        cin >> m;
        x =( m / a ) +( m / b ) -( m / NWW( a, b ) );
        k = x +( m / c ) -( x / c );
        cout << k << endl;
    }
    return 0;
}