Submission #549064

#	Time	Username	Problem	Language	Result	Execution time	Memory
549064		Belgutei	Lightning Rod (NOI18_lightningrod)	C++17	100 / 100	1735 ms	95472 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define ff first
#define ss second
#define pb push_back
#define mk make_pair
#define IOS ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int n;
int a,b;
map<int,int> mp;
int mx = -1;
int ans;

stack<int> s;

int main(){
    IOS
    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> a >> b;
        if(a + b <= mx){
            continue;
        }
        mx = max(mx,a+b);
        int val = a - b;
        while(s.size()>0){
            if(s.top() >= val){
                s.pop();
            }
            else break;
        }
        s.push(val);
    }

    cout << 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