#include <bits/stdc++.h>
using namespace std;
int main(){
	int i=100,sum=0;
	for(int y=5;y<i;y+=5){
		for(int t=2;t<i-y;t+=2){
			if(y+t>=i)continue;
			sum++;
		}
	}
	cout<<sum;
	return 0;
}

/**************************************************************
	Problem: 1025
	User: zhouhongyi
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/