oj.uz

Submission #676200

# Submission time Handle Problem Language Result Execution time Memory
676200 2022-12-29T20:04:17 Z Toxtaq Star triangles (IZhO11_triangle) C++17
0 / 100
 2000 ms 4152 KB 
#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin >> n;
    vector<int>x(n), y(n);
    for(int i = 0;i < n;++i){
        cin >> x[i] >> y[i];
    }
    vector<pair<int, int>>pairs(n);
    for(int i = 0;i < n;++i){
        pairs[i] = {x[i], i};
    }
    sort(pairs.begin(), pairs.end());
    int nxt = 0;
    for(int i = 0;i < n;++i){
        if(i > 0 && pairs[i - 1].first != pairs[i].first)nxt++;
        x[pairs[i].second] = nxt;
    }
    for(int i = 0;i < n;++i){
        pairs[i] = {y[i], i};
    }
    sort(pairs.begin(), pairs.end());
    nxt = 0;
    for(int i = 0;i < n;++i){
        if(i > 0 && pairs[i - 1].first != pairs[i].first)nxt++;
        y[pairs[i].second] = nxt;
    }
    vector<int>X(300001), Y(300001);
    for(int i = 0;i < n;++i){
        X[x[i]]++;
        Y[y[i]]++;
    }
    int result = 0;
    for(int i = 0;i < n;++i){
        if(Y[y[i]] < 2)continue;
        Y[y[i]]--;
        for(int j = i + 1;j < n;++j){
            if(y[i] == y[j])result += X[x[i]] + X[x[j]] - 2;
        }
    }
    cout << result;
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 1 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2644 KB Output is correct
7 Correct 1 ms 2644 KB Output is correct
8 Correct 1 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 9 ms 2772 KB Output is correct
13 Correct 24 ms 2820 KB Output is correct
14 Correct 17 ms 2812 KB Output is correct
15 Execution timed out 2082 ms 4152 KB Time limit exceeded
16 Halted 0 ms 0 KB -