#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

int main(){
     int a,b,c,s=0;
     for(a=1;a<=1*100/5;a++){
   	      for(b=1;b<=1*100/2;b++){
   	    	   for(c=1;c<=1*100/1;c++){
   	    	   	    if(a*5+b*2+c*1==1*100){
   	    	   	    	  s=s+1;
						  }
				  }
		   }
   }cout<<s<<endl;
}
/**************************************************************
	Problem: 1025
	User: admin
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/