제출 #1300597

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1300597		danglayloi1	Lightning Rod (NOI18_lightningrod)	C++20	100 / 100	284 ms	79760 KiB

Main

#include <bits/stdc++.h>
using namespace std;

inline int readInt() { 
    int x=0; char ch=getchar_unlocked(); bool s=1; 
    while(ch<'0'||ch>'9'){if(ch=='-')s=0;ch=getchar_unlocked();} 
    while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+ch-'0';ch=getchar_unlocked();} 
    return s?x:-x; 
} 

stack<pair<int,int> >s;

int main(){
	int n=readInt();
	for(int i=0;i<n;i++){
		int x=readInt(),y=readInt();
		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: 20 / 20