Submission #1020075

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020075		ajay	Star triangles (IZhO11_triangle)	C++17	100 / 100	251 ms	12160 KiB

triangle

/* Ajay Jadhav */
 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <deque>
#include <vector>
#include <cstdlib>
#include <iomanip>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <stack>
#include <ctime>
#include <string.h>
#include <climits>
#include <cstring>
using namespace std;
 
 
#define ll          long long
#define pb          push_back
#define pii         pair<int,int>
#define vi          vector<int>
#define vii         vector<pii>
#define mi          map<int,int>
#define mii         map<pii,int>
#define all(a)      (a).begin(),(a).end()
#define x           first
#define y           second
#define sz(x)       (int)x.size()
#define hell        1000000007
#define rep(i,a,b)  for(int i=a;i<b;i++)
#define endl        '\n'
 
 
 
void solve()
{
    int n, ans = 0;
    cin>>n;
    mi xs, ys;
    vii a(n);
    rep(i,0,n)
    {
    	cin >> a[i].x >> a[i].y;
    	xs[a[i].x]++;
    	ys[a[i].y]++;
    } 

    rep (i,0,n)
    {
    	int xc = xs[a[i].x] - 1;
    	int yc = ys[a[i].y] - 1;
    	ans += (xc * yc);
    }
    cout<<ans<<endl;
}
 
signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin>>t;
    while (t--)
    {
        solve();
    }
    return 0;
}

• Subtask 1: 100 / 100