#include <stdio.h>

int main(){
	int score = 0;
	scanf("%d",&score);
	
	int t = 5;
	int g = 2;
	int pg = 3;
	
	int count = 0;
	for(int i = (score / t);i > 0;i--){
		for(int j = (score / pg);j > 0;j--){
			for(int k = (score / g);k > 0;k--){
				if((i * t) + (j * pg) + (k * g) == score){
					count++;
				}
			}
		}
	}
	printf("%d",count);
}