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Submission #530922

# Submission time Handle Problem Language Result Execution time Memory
530922 2022-02-27T06:10:04 Z ohohorz Star triangles (IZhO11_triangle) C++14
100 / 100
 992 ms 53104 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int,int>
#define f first
#define s second
#define mp make_pair
#define pb push_back


const int N = 3e5 + 5;
const int INF = 1e18;
int x[N], y[N];
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);

    int n;
    cin>>n;    
    int ans = 0;
    for(int i = 1;i <= n;i++){
        cin >> x[i] >> y[i];
    }
    set< pii> se;

    map<int,int> cntx, cnty;
    map<pii, int> lol;
    for(int i= 1;i <= n;i++){
        cntx[x[i]] ++;
        cnty[y[i]] ++;
        lol[mp(x[i], y[i])] ++;
    }



    for(int i = 1;i <= n;i++){
        // if(se.count(mp(x[i], y[i]))) continue;
        int a = x[i], b = y[i];
        
        // (a, b2)
        // (a, b)   (a2, b)

        // find number of points such that x = a
        // find number of points such that y = b
        ans += ((cntx[a] - 1) * (cnty[b] - 1));
        se.insert(mp(a, b));
    }
    cout <<ans<<"\n";

}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 11 ms 2252 KB Output is correct
13 Correct 10 ms 2252 KB Output is correct
14 Correct 15 ms 2764 KB Output is correct
15 Correct 237 ms 18320 KB Output is correct
16 Correct 320 ms 19544 KB Output is correct
17 Correct 238 ms 20460 KB Output is correct
18 Correct 285 ms 20420 KB Output is correct
19 Correct 868 ms 49524 KB Output is correct
20 Correct 627 ms 36912 KB Output is correct
21 Correct 992 ms 53104 KB Output is correct
22 Correct 944 ms 53060 KB Output is correct