Submission #1134722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134722		Aviansh	Lightning Rod (NOI18_lightningrod)	C++17	80 / 100	1043 ms	117384 KiB

Main

#include <bits/stdc++.h>

using namespace std;

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    array<int,2>arr[n];
    for(int i = 0;i<n;i++){
        cin >> arr[i][0];
        cin >> arr[i][1];
    }
    int p[n];
    fill(p,p+n,-1);
    int prev = 0;
    for(int i = 1;i<n;i++){
        if(arr[i][0]-arr[prev][0]<=arr[prev][1]-arr[i][1]){
            p[i]=prev;
        }
        else{
            prev=i;
        }
    }
    prev=n-1;
    for(int i = n-2;i>=0;i--){
        if(arr[prev][0]-arr[i][0]<=arr[prev][1]-arr[i][1]){
            p[i]=prev;
        }
        else{
            prev=i;
        }
    }
    int ans = 0;
    for(int i = 0;i<n;i++){
        if(p[i]==-1){
            ans++;
        }
    }
    cout << ans;
    return 0;
}

• 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