Tcs mockvita question C

class pairs
{
public: ll x,y;
};
bool sorter(pairs p1,pairs p2)
{
if(p1.x!=p2.x)return (p1.x<p2.x);
else return (p1.y<=p2.y);
}
class solution
{
ll c;
vector<pairs> distSpeedRatio;
void input()
{
    cin>>c;
    distSpeedRatio.resize(c);
    for(int i=0;i<distSpeedRatio.size();i++)
    {
        ll x,y;
        cin>>x>>y>>distSpeedRatio[i].y;
        ll dist=x*x+y*y;
        distSpeedRatio[i].y*=distSpeedRatio[i].y;
        distSpeedRatio[i].x=dist/distSpeedRatio[i].y;
        distSpeedRatio[i].y=dist%distSpeedRatio[i].y;
    }
}
public:
solution()
{
    input();
    sort(distSpeedRatio.begin(),distSpeedRatio.end(),sorter);
    ll ans=0,chain=1;
    for(int i=1;i<distSpeedRatio.size();i++)
    {
        if(distSpeedRatio[i].x==distSpeedRatio[i-1].x&&distSpeedRatio[i].y==distSpeedRatio[i-1].y)
        {
            chain++;
        }
        else
        {
            ans+=chain*(chain-1)/2;
            chain=1;
        }
        
    }
    ans+=chain*(chain-1)/2;
    cout<<ans<<endl;
}
};

Can anyone please tell me that in which case my code doesn’t pass I got RTE verdict
Thanks in advanced.