Submission #341158

#	Time	Username	Problem	Language	Result	Execution time	Memory
341158		ommivorous	Lightning Rod (NOI18_lightningrod)	C++14	80 / 100	2083 ms	192352 KiB

Main

#include <bits/stdc++.h>
using namespace std;
 
stack<pair<int,int> >s;
 
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
	int n; cin>>n;
	for(int i=0;i<n;i++){
		int x,y; cin>>x>>y;
		bool add=1;
		while(s.size()){
			int tx=s.top().first,ty=s.top().second;
			if(x-tx<=ty-y){add=0;break;}
			if(x-tx<=y-ty)s.pop();
			else break;
		}
		if(add)s.push(make_pair(x,y));
	}
	printf("%d",(int)s.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: 0 / 20