import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        long a = sc.nextLong();
        long b = sc.nextLong();
        int c = sc.nextInt();
        long[] counts = new long[c];
        Arrays.fill(counts, a / c);
        for (int i = 1; i <= a % c; i++) {
            counts[i]++;
        }
        long ans = 0;
        for (int i = 1; i < c; i++) {
            ans += pow(i, b, c) * counts[i] % c;
            ans %= c;
        }
        System.out.println(ans);
    }
    
    static long pow(long x, long p, int m) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return pow(x * x % m, p / 2, m);
        } else {
            return pow(x, p - 1, m) * x % m;
        }
    }
}

class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}