#include<iostream>
using namespace std;
int main()
{
	//freopen("transfer.in","r",stdin);
	//freopen("transfer.out","w",stdout);
	long long n ,a[105][105],you=0,k;
	cin>>n;
	
	for(int i = 0 ; i < n ; i ++)
	{
		for(int j = 0 ; j < 3 ; j ++)
		{
			cin>>a[i][j];
		}
	}
	   
	for(int i = 0 ; i < n ; i ++)
	{
			if( a[i][0] == 0 )
				you += a[i][1];			
			else			
			{
				k = 0;
				for( int j=i-1; j>=0; --j )
				{
					if( a[i][2]-a[j][2] <= 45 && a[i][1] <= a[j][1] )
					{
						k = 1;
						break;
					}
				}
				
				if( k == 0 )
					you += a[i][1];
			}
	  }
	  
	  cout<<you;
	  
	  return 0;
}