Submission #1357571

#	Time	Username	Problem	Language	Result	Execution time	Memory
1357571		jump	Lightning Rod (NOI18_lightningrod)	C++20	100 / 100	920 ms	159172 KiB

Main

#include <bits/stdc++.h>
#define int long long
int n,cnt=1;
signed main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  std::stack<std::pair<int,int>> st;
  std::cin >> n;
  for(int i=0;i<n;i++){
    int nx,ny;
    std::cin >> nx >> ny;
    if(st.empty()){
      st.push({nx,ny});
    }
    else if(st.top().second-ny<nx-st.top().first){
      while(!st.empty()&&ny-st.top().second>=nx-st.top().first)st.pop();
      st.push({nx,ny});
    }
  }
  std::cout << st.size();
}

• Subtask 1: 4 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 10 / 10
• Subtask 7: 20 / 20