제출 #1300590

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1300590		danglayloi1	Lightning Rod (NOI18_lightningrod)	C++20	0 / 100	1098 ms	79712 KiB

Main

#include <bits/stdc++.h>
#define ii pair<int, int>
#define fi first
#define se second
#define inf 0x3f3f3f3f3f3f3f3f
using namespace std;
using ll = long long;
const ll mod=1e9+7;
const int nx=1e7+5;
int n, ans=0, cur=-1;
stack<ii> st;
inline int readInt()
{
	int x = 0;
	char ch = getchar_unlocked();
	while (ch < '0' || ch > '9')
		ch = getchar_unlocked();
	while (ch >= '0' && ch <= '9')
	{
		x = (x << 3) + (x << 1) + ch - '0';
		ch = getchar_unlocked();
	}
	return x;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    for(int i = 1; i <= n; i++)
    {
        int x=readInt(), y=readInt();
        bool ok=1;
        while(st.size())
        {
            ii p=st.top();
            if(x-p.fi<=p.se-y)
            {
                ok=0;
                break;
            }
            if(x-p.fi<=y-p.se)
                st.pop();
            else break;
        }
        if(ok) st.push({x, y});
    }
    cout<<st.size();
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 21
• Subtask 5: 0 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20