Submission #164936

#	Time	Username	Problem	Language	Result	Execution time	Memory
164936		gs18103	Safety (NOI18_safety)	C++14	100 / 100	70 ms	3684 KiB

safety

#include <bits/stdc++.h>
 
using namespace std;
 
using ll = long long;
 
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n;
    ll h;
    cin >> n >> h;
    priority_queue<ll> left;
    priority_queue<ll, vector<ll>, greater<ll>> right;
    ll ans = 0;
    int s;
    cin >> s;
    left.push(s);
    right.push(s);
    for (int i = 1; i < n; i++) {
        cin >> s;
        ll shift = i * h;
        ll left_border = left.top() - shift;
        ll right_border = right.top() +  shift;
        if (s < left_border) {
            left.push(s + shift);
            left.push(s + shift);
            left.pop();
            right.push(left_border - shift);
            ans += abs(s - left_border);
        } else if (s > right_border) {
            right.push(s - shift);
            right.push(s - shift);
            right.pop();
            left.push(right_border + shift);
            ans += abs(s - right_border);
        } else {
            left.push(s + shift);
            right.push(s - shift);
        }
    }
    cout << ans;
    return 0; 
}

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 9 / 9
• Subtask 4: 5 / 5
• Subtask 5: 6 / 6
• Subtask 6: 11 / 11
• Subtask 7: 11 / 11
• Subtask 8: 22 / 22
• Subtask 9: 29 / 29