Choose Bunz

/*
    Task        : Choose Bunz
    Author      : Phumipat C. [MAGCARI]
    Language    : C++
*/
#include<bits/stdc++.h>
using namespace std;
int pascal[2][10010];
int main(){
    int n,r,k;
    scanf("%d %d %d",&n,&r,&k);
    for(int i=1;i<=n;i++){
        pascal[i%2][0] = pascal[i%2][i] = 1%k;
        for(int j=1;j<i;j++){
            pascal[i%2][j] = (pascal[(i+1)%2][j-1] + pascal[(i+1)%2][j])%k;
        }
    }
    printf("%d\n",pascal[n%2][r]%k);
    return 0;
}