Submission #784316

#	Time	Username	Problem	Language	Result	Execution time	Memory
784316		12345678	Safety (NOI18_safety)	C++17	100 / 100	49 ms	5508 KiB

safety

#include <bits/stdc++.h>

using namespace std;

#define ll long long

ll n, h, lzl, lzr, s, ans;
priority_queue<ll> l;
priority_queue<ll, vector<ll>, greater<ll>> r;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>h;
    for (int i=1; i<=n; i++)
    {
        cin>>s;
        if (i>1&&s<l.top()+lzl)
        {
            l.push(s-lzl);
            l.push(s-lzl);
            ll tmp=l.top()+lzl;
            ans+=tmp-s;
            l.pop();
            r.push(tmp-lzr);
        }
        else if (i>1&&s>r.top()+lzr)
        {
            r.push(s-lzr);
            r.push(s-lzr);
            ll tmp=r.top()+lzr;
            ans+=s-tmp;
            r.pop();
            l.push(tmp-lzl);
        }
        else
        {
            l.push(s-lzl);
            r.push(s-lzr);
        }
        lzl-=h; lzr+=h;
    }
    cout<<ans;
}

• 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