oj.uz

Submission #934437

# Submission time Handle Problem Language Result Execution time Memory
934437 2024-02-27T10:20:35 Z alexander707070 Candies (JOI18_candies) C++14
100 / 100
 287 ms 30924 KB 
#include<bits/stdc++.h>
#define MAXN 500007
using namespace std;

const long long inf=1e17;

struct node{
    int l,r;
    int from,to;
    long long res;
};

int n,best;
long long a[MAXN],sum,maxs,curr;
bool used[MAXN];

long long even[MAXN],odd[MAXN];
node w[MAXN];

void erasev(int x){
    w[w[x].l].r=w[x].r;
    w[w[x].r].l=w[x].l;
}

long long pref[MAXN];

long long summ(int l,int r){
    if(l%2==0){
        return pref[r]-pref[l-2];
    }else{
        if(l==1)return pref[r];
        else return pref[r]-pref[l-2];
    }
}

set< pair<long long,int> > s;
pair<long long,int> z;

int main(){

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        pref[i]=a[i];
        w[i]={i-1,i+1,i,i,a[i]};

        s.insert({w[i].res,i});
    }

    for(int i=2;i<=n;i++){
        pref[i]+=pref[i-2];
    }

    w[0].r=1;
    w[n+1].l=n;

    for(int i=1;i<=n/2+n%2;i++){
        z=*s.rbegin();

        maxs=z.first;
        best=z.second;

        s.erase(z);

        sum+=maxs;

        if(w[best].l==0){
            s.erase({w[w[best].r].res,w[best].r});
            erasev(w[best].r);
            erasev(best);

        }else if(w[best].r==n+1){
            s.erase({w[w[best].l].res,w[best].l});
            erasev(w[best].l);
            erasev(best);
        }else{
            w[best].from=w[w[best].l].from;
            w[best].to=w[w[best].r].to;

            w[best].res=summ(w[best].from,w[best].to)-summ(w[best].from+1,w[best].to-1);

            s.erase({w[w[best].l].res,w[best].l});
            erasev(w[best].l);

            s.erase({w[w[best].r].res,w[best].r});
            erasev(w[best].r);

            s.insert({w[best].res,best});
        }
        
        cout<<sum<<"\n";
    }

    return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4696 KB Output is correct
2 Correct 2 ms 4700 KB Output is correct
3 Correct 2 ms 4700 KB Output is correct
4 Correct 2 ms 4700 KB Output is correct
5 Correct 2 ms 4700 KB Output is correct
6 Correct 2 ms 4700 KB Output is correct
7 Correct 2 ms 4700 KB Output is correct
8 Correct 2 ms 4700 KB Output is correct
9 Correct 2 ms 4700 KB Output is correct
10 Correct 2 ms 4700 KB Output is correct
11 Correct 2 ms 4700 KB Output is correct
12 Correct 2 ms 4580 KB Output is correct
13 Correct 2 ms 4700 KB Output is correct
14 Correct 2 ms 4700 KB Output is correct
15 Correct 2 ms 4700 KB Output is correct
16 Correct 2 ms 4700 KB Output is correct
17 Correct 2 ms 4700 KB Output is correct
18 Correct 2 ms 4700 KB Output is correct
19 Correct 2 ms 4700 KB Output is correct
20 Correct 2 ms 4700 KB Output is correct

Subtask #2
92.0 / 92.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4696 KB Output is correct
2 Correct 2 ms 4700 KB Output is correct
3 Correct 2 ms 4700 KB Output is correct
4 Correct 2 ms 4700 KB Output is correct
5 Correct 2 ms 4700 KB Output is correct
6 Correct 2 ms 4700 KB Output is correct
7 Correct 2 ms 4700 KB Output is correct
8 Correct 2 ms 4700 KB Output is correct
9 Correct 2 ms 4700 KB Output is correct
10 Correct 2 ms 4700 KB Output is correct
11 Correct 2 ms 4700 KB Output is correct
12 Correct 2 ms 4580 KB Output is correct
13 Correct 2 ms 4700 KB Output is correct
14 Correct 2 ms 4700 KB Output is correct
15 Correct 2 ms 4700 KB Output is correct
16 Correct 2 ms 4700 KB Output is correct
17 Correct 2 ms 4700 KB Output is correct
18 Correct 2 ms 4700 KB Output is correct
19 Correct 2 ms 4700 KB Output is correct
20 Correct 2 ms 4700 KB Output is correct
21 Correct 287 ms 30732 KB Output is correct
22 Correct 212 ms 30800 KB Output is correct
23 Correct 216 ms 30840 KB Output is correct
24 Correct 101 ms 30532 KB Output is correct
25 Correct 101 ms 30548 KB Output is correct
26 Correct 98 ms 30544 KB Output is correct
27 Correct 115 ms 30800 KB Output is correct
28 Correct 112 ms 30884 KB Output is correct
29 Correct 117 ms 30856 KB Output is correct
30 Correct 125 ms 30804 KB Output is correct
31 Correct 122 ms 30804 KB Output is correct
32 Correct 129 ms 30804 KB Output is correct
33 Correct 172 ms 30544 KB Output is correct
34 Correct 175 ms 30620 KB Output is correct
35 Correct 171 ms 30544 KB Output is correct
36 Correct 245 ms 30716 KB Output is correct
37 Correct 216 ms 30912 KB Output is correct
38 Correct 268 ms 30896 KB Output is correct
39 Correct 102 ms 30544 KB Output is correct
40 Correct 101 ms 30692 KB Output is correct
41 Correct 109 ms 30548 KB Output is correct
42 Correct 133 ms 30924 KB Output is correct
43 Correct 111 ms 30840 KB Output is correct
44 Correct 117 ms 30804 KB Output is correct
45 Correct 125 ms 30800 KB Output is correct
46 Correct 118 ms 30720 KB Output is correct
47 Correct 123 ms 30800 KB Output is correct
48 Correct 170 ms 30688 KB Output is correct
49 Correct 173 ms 30544 KB Output is correct
50 Correct 177 ms 30720 KB Output is correct