#include <bits/stdc++.h>
using namespace std;
struct Trans {
	int t;
	int price;
	int time;
};
Trans a[100000];
int n,ans, select = -1;
int main() {
	scanf("%d",&n);
	for(int i=0; i<n; i++) {
		cin>>a[i].t>>a[i].price>>a[i].time;
		if(a[i].t==0) { 
			ans+=a[i].price;
		} else {
			select = -1;
			for(int j=i-1; j>=0; j--) {
				if(a[i].time-a[j].time<=45) {
					if(a[j].t==0 && a[j].price>=a[i].price) {
						select = j;
					}
				} else {
					if(select != -1) {
						a[select].price = 0;
					} else {
						ans += a[i].price;
					}
					break;
				}
			}
		}
	}
	cout<<ans;
	return 0;
}

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