#include <cmath>
#include <ctime>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <limits>
#include <string>
#include <sstream>
using namespace std;

namespace dts
{
    typedef long long ll;
    
    ll ny(ll x,ll key)
    {
        if (x==1)
            return 1;
        else
            return -(key/x)*ny(key%x,key)%key;
    }
    
    ll a,b,key;
    
    void main()
    {
        while (~scanf("%lld%lld%lld",&a,&b,&key))
        {
            ll p=ny(2,key);
            if (p<0)
                p+=((key-p)/key)*key;
            ll ans=(p*(((a-1)%key)*((b-1)%key)%key))%key;
            printf("%lld\n",ans);
        }
    }
};

int main()
{
    dts::main();
}