oj.uz

답안 #531725

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
531725 2022-03-01T10:37:02 Z kebine 별들과 삼각형 (IZhO11_triangle) C++17
100 / 100
 691 ms 11988 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
int n;
pair<int, int> star[300005];
map<int, int> x, y;


int main() {
  cin >> n;
  for(int i = 0; i < n; i++) {
    cin >> star[i].first >> star[i].second;
    //cout << star[i].first << " " << star[i].second << endl;
    if(x.count(star[i].first) > 0) {
      int now = x.find(star[i].first) -> second;
      x.erase(star[i].first);
      x.insert({star[i].first, now + 1});
      //cout << "x" << now << endl;
    }
    else {
      x.insert({star[i].first, 1});
    }
    if(y.count(star[i].second) > 0) {
      int now = y.find(star[i].second) -> second;
      y.erase(star[i].second);
      y.insert({star[i].second, now + 1});
      //cout << "y" << now << endl;
    }
    else {
      y.insert({star[i].second, 1});
    }
  }
  
  ll ans = 0;
  
  for(int i = 0; i < n; i++) {
    int hor = x.find(star[i].first) -> second;
    hor--;
    int ver = y.find(star[i].second) -> second;
    ver--;
    ans += 1ll * ver * hor;
    
  }
  cout << ans << endl;
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 300 KB Output is correct
6 Correct 1 ms 300 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 304 KB Output is correct
12 Correct 14 ms 964 KB Output is correct
13 Correct 15 ms 964 KB Output is correct
14 Correct 18 ms 1384 KB Output is correct
15 Correct 204 ms 6140 KB Output is correct
16 Correct 229 ms 6336 KB Output is correct
17 Correct 220 ms 6188 KB Output is correct
18 Correct 210 ms 6184 KB Output is correct
19 Correct 629 ms 11460 KB Output is correct
20 Correct 431 ms 9220 KB Output is correct
21 Correct 691 ms 11988 KB Output is correct
22 Correct 664 ms 11972 KB Output is correct