#include<stdio.h>

int tri(int k) {
	int num = k * (k + 1) / 2;
	return num;
}

int min(int a,int b){
    int tmp=a;
    if(a>b){
        tmp=b;
    }
    return tmp;
}

int main(void) {
	int N;
	int ans=3;

	scanf("%d", &N);

	//１つか２つの三角数のどちらであるかを判定
	for(int k=1;tri(k)<=N;k++){
		if (N == tri(k)) {
			ans = 1;
			break;
		}

        int tmp = N-tri(k);
        for(int m=k;tri(m)<=tmp;m++){
            if (tri(m) == tmp) {
                ans = min(2,ans);
                break;
            }
        }
	}

	printf("%d\n",ans);

	return 0;

}