Submission #470094

#	Time	Username	Problem	Language	Result	Execution time	Memory
470094		definitelynotmee	Safety (NOI18_safety)	C++98	100 / 100	59 ms	5100 KiB

safety

    #include<bits/stdc++.h>
    #define mp make_pair
    #define mt make_tuple
    #define ff first
    #define ss second
    using namespace std;
    template <typename T>
    using matrix = vector<vector<T>>;
    typedef long long ll;
    typedef pair<int,int> pii;
    typedef pair<ll,ll> pll;
    const ll INFL = (1LL<<62)-1;
    const int INF = (1<<30)-1;
    const double EPS = 1e-7;
    const int MOD = 1e9 + 7;
    const int MAXN = 1e6+1;
     
     
     
    int main(){
     
        ios_base::sync_with_stdio(false);
        cin.tie(nullptr);
     
        int n;
        ll h;
        cin >> n >> h;
        vector<ll> v(n);
        
        for(int i = 0; i < n; i++)
            cin >> v[i];
        priority_queue<ll> left;
        priority_queue<ll,vector<ll>,greater<ll>> right;
        left.push(v[0]);
        right.push(v[0]);
     
        ll offset = 0;
        ll resp = 0;
        for(int i = 1; i < n; i++){
            offset+=h;
            pll last = {left.top()-offset,right.top()+offset};
            if(v[i]<= last.ff){
                left.push(v[i]+offset);
                left.push(v[i]+offset);
                right.push(left.top()-offset*2);
                left.pop();
                resp+=max(0ll,last.ff-v[i]);
            } else {
                right.push(v[i]-offset);
                right.push(v[i]-offset);
                left.push(right.top() +2*offset);
                right.pop();
                resp+=max(0ll,v[i]-last.ss);
            }
        }
        cout << resp << '\n';
     
        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