#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
using namespace std;
map<int, int>M;
int n,sum=0;
int main() {
	cin >> n;
	auto it = M.begin();
	for (int i = 1; i <= n; i++) {
		int a, b, c;
		cin >> a >> b >> c;//c is time,b is price
		if (a == 0) //乘地铁
			M[c]=b,sum+=b;
		else {
			while (it != M.end()) {
				if (c - it->second > 45) it++;
				else break;
			}
			if (it == M.end()||it->second<b) sum += b;//没有票可以用，付钱
			else it++;//把票用了
		}
		//cout << sum << " "<<endl;
	}
	cout << sum;
}

求助，不会用map