Submission #863974

#	Time	Username	Problem	Language	Result	Execution time	Memory
863974		abcvuitunggio	Safety (NOI18_safety)	C++17	100 / 100	41 ms	5492 KiB

safety

#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,h,s,x,y,res;
priority_queue <int> p,q;
int32_t main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n >> h;
    for (int i=0;i<n;i++){
        cin >> s;
        x=i*h-s,y=s+i*h;
        if (p.empty()||x<p.top()){
            p.push(x);
            p.push(x);
            res+=p.top()-x;
            q.push(i*h*2-p.top());
            p.pop();
        }
        else if (q.empty()||y<q.top()){
            q.push(y);
            q.push(y);
            res+=q.top()-y;
            p.push(i*h*2-q.top());
            q.pop();
        }
        else{
            p.push(x);
            q.push(y);
        }
    }
    cout << res;
}

• 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