#include <bits/stdc++.h>

#define int long long

using namespace std;

struct edge {
	int p, t;
};

vector<edge> vec;

int n, ans;

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	cin >> n;
	int opt, p, t;
	for (int i = 1; i <= n; ++i) {
		cin >> opt >> p >> t;
		if (opt == 0) {
			ans += p;
			vec.push_back({p, t});
		}
		else {
			ans += p;
			for (int j = 0; j < vec.size(); ++j) {
				auto ti = vec[j];
				int tp = ti.p, tt = ti.t;
				if (tp >= p && t - tt <= 45) {
					ans -= p;
					vec.erase(vec.begin() + j);
					break ;	
				}
				else if(t - tt > 45) vec.erase(vec.begin() + j);
			}
		}
	}
	cout << ans;
	return 0;
}