Submission #1139841

#	Time	Username	Problem	Language	Result	Execution time	Memory
1139841		fcmalkcin	Lightning Rod (NOI18_lightningrod)	C++20	0 / 100	1096 ms	324 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;
        bool checkAdd = false;
        while (true){
            if (st.size() == 0){
                st.push({x,y});
                break;
            }
            ll sx = st.top().first, sy = st.top().second;
            if (x-sx<=sy-y) break;
            else if (x-sx <=y-sy) { 
                st.pop();
                checkAdd = true;
            }
            else {
                break;
            }
        }
        if (checkAdd) st.push({x, y});
    }
    
    cout<<st.size()<<endl;
}

• 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