#include <iostream>
using namespace std;
long n,id,t,m,a,all=0;
int main() {
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>id>>t>>m>>a;
		m=t*60+m;
		//cout<<m<<endl;
		if(id==0 and (m>=18*60 or m==0)){
			all+=a*7/10;
 
		}else if(id==1 and (m>=10*60 or m==0)){
			all+=a*7/10;
 
		}else if(id==2 and ((m>=10*60 and m<=17*60 ) or m==0 or 
		m>=20*60 )){
			all+=a*65/100;
 
		}else if(  id==3 and (m>=(16*60+30) and m<=(22*60+30)) ){
			all+=a*6/10;
 
		}else{
			all+=a;
		}
	}
	cout<<all;
	return 0;
}

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MgowIDAgMCAxMDAKMyAxNiAwIDEwMA==

2
0 0 0 100
3 16 0 100