Submission #944473

#	Time	Username	Problem	Language	Result	Execution time	Memory
944473		Zena_Hossam	Star triangles (IZhO11_triangle)	C++14	100 / 100	751 ms	37492 KiB

triangle

#include <bits/stdc++.h>
using namespace std;
#define fi ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll double
#define ll long long
//#define ll1 long long
#define F first
#define S second
#define sz size()
#define all(s) s.begin(),s.end()
#define all1(s) s.rbegin(),s.rend()
int main()
{
   // freopen("measurement.in","r",stdin);freopen("measurement.out","w",stdout);
    ll T=1;
    //cin>>T;ll oo=0;
    while(T--)
    {
       ll n;
       cin>>n;
       pair<ll,ll>a[n];map<ll,map<ll,ll>>m;
       map<ll,ll>x,b;
       for(ll i=0;i<n;i++){
        cin>>a[i].first>>a[i].second;x[a[i].F]++;b[a[i].S]++;
        m[a[i].first][a[i].second]++;
       }ll c=0;
       for(ll i=0;i<n;i++){ll g=a[i].first,h=a[i].second;
        c+=(x[g]-1)*(b[h]-1)-(m[g][h]-1);
       }cout<<c;
    }
}

Compilation message (stderr)

triangle.cpp:5: warning: "ll" redefined
    5 | #define ll long long
      | 
triangle.cpp:4: note: this is the location of the previous definition
    4 | #define ll double
      |

• Subtask 1: 100 / 100