CAU1 HSGHN L9 2015-2016

#define task "CAU1"

#include <iostream>
#include <cstdio>

using namespace std;

using ll = long long;

ll a, b, c;

void Read()
{
    cin >> a >> b >> c;
}

void Solve()
{
    ll ans(1);

    for (; a <= b; ++a)
        ans = ans * a % c;

    cout << ans;
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen(task ".INP", "r"))
    {
        freopen(task ".INP", "r", stdin);
        freopen(task ".OUT", "w", stdout);
    }

    Read();
    Solve();
}