#include<bits/stdc++.h>
using namespace std;
int n,t,i;
int vis[10010],price[10010],timen[10010],cnt=0,tsum=0,sum=0;
const int MOD=45;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
cout.precision(10);
cout<<fixed;
cin>>n;
t=n;
for(i=1;i<=n;i++)
{
cin>>vis[i]>>price[i]>>timen[i];
if(i==1)
{
if(vis[i]==1)
{
tsum++;
sum+=price[1];
}
}
else
{
if(tsum!=0&&(timen[i]-timen[i-1])<45&&price[i]<=price[i-1])
{
tsum=0;
continue;
}
else
{
sum+=price[i];
}
}
}
cout<<sum<<"\n";
}