Submission #1139837

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139837		mattsoh	Lightning Rod (NOI18_lightningrod)	C++20	66 / 100	1098 ms	58700 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
stack<pair<ll,ll>> st;
signed main(){
    ll n;cin>>n;
    for (ll i = 0;i<n;i++){
        ll x,y;cin>>x>>y;
        while (true){
            if (st.size() == 0){
                st.push({x,y});
                continue;
            }
            ll sx = st.top().first, sy = st.top().second;
            if (x-sx<=sy-y) break;
            else if (x-sx <=y-sy) st.pop();
            else {
                st.push({x,y});
                break;
            }
        }
    }
    cout<<st.size()<<endl;
}

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