Submission #1300592

#	Time	Username	Problem	Language	Result	Execution time	Memory
1300592		danglayloi1	Lightning Rod (NOI18_lightningrod)	C++17	80 / 100	1096 ms	79812 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, x, y;
stack<ii> st;
ii p;
bool ok;
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    while(n--)
    {
        cin>>x>>y;
        ok=1;
        while(st.size())
        {
            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: 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