#include <bits/stdc++.h>
using namespace std;
int main(){
    int N;
    cin>>N;
    vector<vector<long double>> lines(3,vector<long double>(1,0));
    int p;
    long long ans=0;
    long double a,b;
    for(int i=0;i<N;i++){
        cin>>p>>a>>b;
        lines[p].push_back(b/(b+a));
    }
    for(int i=0;i<3;i++){
        sort(lines[i].begin(),lines[i].end(),[](long double a,long double b){return a<b;});
    }
    int m,M,mid;
    sort(lines.begin(),lines.end(),[](vector<long double>& a,vector<long double>& b){return a.size()<b.size();});
    for(int i=0;i<lines[0].size();i++){
        for(int j=0;j<lines[1].size();j++){
            if(lines[0][i]+lines[1][j]>1){
                continue;
            }
            m=0;
            M=lines[2].size();
            while(M-m>1){
                mid=(m+M)/2;
                if(lines[2][mid]+lines[0][i]+lines[1][j]>1){
                    M=mid;
                }else{
                    m=mid;
                }
            }

            if(lines[2][m]+lines[0][i]+lines[1][j]==1){
                ans-=1;
            }
            m=-1;
            M=lines[2].size();
            while(M-m>1){
                mid=(m+M)/2;
                if(lines[2][mid]+max(lines[0][i],lines[1][j])>1){
                    M=mid;
                }else{
                    m=mid;
                }
            }
            ans+=m+1;
        }
    }
    cout<<ans<<endl;
}