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  1. #pragma GCC optimize("Ofast")
  2.  
  3. #include <bits/stdc++.h>
  4. using namespace std;
  5.  
  6. #define y0 holdtheflower
  7. #define y1 enjoythecolorandscent
  8. #define yn walkthroughthesoulgarden
  9. #define j1 feelthewarmbreathofkindnessandsalvation
  10.  
  11. #define endl '\n'
  12. mt19937 rng32(chrono::steady_clock::now().time_since_epoch().count());
  13. mt19937_64 rng64(chrono::steady_clock::now().time_since_epoch().count());
  14.  
  15. int n;
  16. vector<pair<int, int>> a;
  17.  
  18. void Input() {
  19. 	cin >> n; a.resize(n);
  20. 	for (auto &P: a) cin >> P.second >> P.first;
  21. }
  22.  
  23. void Solve() {
  24. 	sort(a.begin(), a.end());
  25. 	int ans = 1, last = a[0].first;
  26. 	for (int i=1; i<n; i++) {
  27. 		if (a[i].second >= last) {
  28. 			ans++;
  29. 			last = a[i].first;
  30. 		}
  31. 	}
  32. 	cout << ans << endl;
  33. }
  34.  
  35. int main(int argc, char* argv[]) {
  36. 	ios_base::sync_with_stdio(0); cin.tie(NULL);
  37. 	Input(); Solve(); return 0;
  38. }
  39.  
  40. /******************************************\
  41.  *  Thuy-Trang Tran, #Team4T's Leader     *
  42.  *  #Team4T Primary Flagship - Salvation  *
  43. \******************************************/
Success #stdin #stdout 0s 15248KB
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5
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3
https://ideone.com/UAdqUM
SPOJ-PTIT | Problem PTIT127C (Greedy/Scheduling).
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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