oj.uz

Submission #1092040

# Submission time Handle Problem Language Result Execution time Memory
1092040 2024-09-23T02:37:19 Z juicy Star triangles (IZhO11_triangle) C++17
100 / 100
 229 ms 26544 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

int main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  int n; cin >> n;
  vector<array<array<int, 2>, 2>> cnt(n);
  array<map<int, vector<array<int, 2>>>, 2> mp;
  for (int i = 0; i < n; ++i) {
    int x, y; cin >> x >> y;
    mp[0][x].push_back({y, i});
    mp[1][y].push_back({x, i});
  }
  for (auto it : {0, 1}) {
    for (auto [x, a] : mp[it]) {
      sort(a.begin(), a.end());
      for (int i = 0; i < a.size(); ) {
        int j = i;
        while (j < a.size() && a[j][0] == a[i][0]) {
          ++j;
        }
        array<int, 2> v = {i, int(a.size()) - j};
        while (i < j) {
          cnt[a[i++][1]][it] = v;
        }
      }
    }
  }
  long long res = 0;
  for (int i = 0; i < n; ++i) {
    for (int x = 0; x < 2; ++x) {
      for (int y = 0; y < 2; ++y) {
        res += (long long) cnt[i][0][x] * cnt[i][1][y];
      }
    }
  }
  cout << res;
  return 0;
}

Compilation message

triangle.cpp: In function 'int main()':
triangle.cpp:25:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |       for (int i = 0; i < a.size(); ) {
      |                       ~~^~~~~~~~~~
triangle.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         while (j < a.size() && a[j][0] == a[i][0]) {
      |                ~~^~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 5 ms 1880 KB Output is correct
13 Correct 5 ms 2004 KB Output is correct
14 Correct 8 ms 2652 KB Output is correct
15 Correct 77 ms 12380 KB Output is correct
16 Correct 87 ms 12884 KB Output is correct
17 Correct 81 ms 12344 KB Output is correct
18 Correct 84 ms 12368 KB Output is correct
19 Correct 224 ms 24944 KB Output is correct
20 Correct 154 ms 19336 KB Output is correct
21 Correct 229 ms 26468 KB Output is correct
22 Correct 218 ms 26544 KB Output is correct