movie_festival.cpp (686B)
1 #include <bits/stdc++.h> 2 3 using namespace std; 4 5 using ui = unsigned int; 6 using l = long; 7 using ul = unsigned long; 8 using ll = long long; 9 using ull = unsigned long long; 10 11 using vi = vector<int>; 12 using vui = vector<ui>; 13 using vl = vector<l>; 14 using vul = vector<ul>; 15 using vll = vector<ll>; 16 using vull = vector<ull>; 17 18 void solve() 19 { 20 int n; 21 cin >> n; 22 vector<pair<int, int>> m; 23 for (int i = 0; i < n; i++) { 24 int s, e; 25 cin >> s >> e; 26 m.push_back({e, s}); 27 } 28 sort(m.begin(), m.end()); 29 int t = 0, res = 0; 30 for (auto x : m) { 31 if (x.second < t) { 32 continue; 33 } 34 t = x.first; 35 res++; 36 } 37 cout << res << "\n"; 38 } 39 40 int main() 41 { 42 ios::sync_with_stdio(0); 43 cin.tie(0); 44 solve(); 45 }