Submission #588446

#	Time	Username	Problem	Language	Result	Execution time	Memory
588446		MilosMilutinovic	Planine (COCI21_planine)	C++14	0 / 110	2 ms	596 KiB

Main

/**
 *    author:  wxhtzdy
 *    created: 03.07.2022 11:30:53
**/
#include <bits/stdc++.h>

using namespace std;
                 
typedef double ldb;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n, h;
  cin >> n >> h;
  vector<int> x(n), y(n);
  for (int i = 0; i < n; i++) {
    cin >> x[i] >> y[i];
  }
  vector<pair<ldb, ldb>> ev;
  for (int i = 2; i < n - 1; i += 2) {
    ldb L = (ldb) x[i] + (ldb) h * (((ldb) x[i - 1] - x[i] + 0.00) / (ldb) (y[i - 1] - y[i] + 0.00));
    ldb R = (ldb) x[i] + (ldb) h * (((ldb) x[i + 1] - x[i] + 0.00) / (ldb) (y[i + 1] - y[i] + 0.00));
    ev.emplace_back(L, R);
  }
  sort(ev.begin(), ev.end());
  int ans = 0;
  ldb ptr = -1e20;
  for (auto& p : ev) {
    if (ptr < p.first) {
      ptr = p.second;
      ans += 1;      
    } else {
      ptr = min(ptr, p.second);
    }
  }  
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60