#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
#define mp make_pair
using namespace std;
ll n,a[200005],ans;
set<pair<ll,ll> >st;
set<ll>ind;
set<pair<ll,ll> >::iterator it;
set<ll>::iterator itt;
int main(){
ios::sync_with_stdio(false);
cin >> n;
for(int i=1; i<=n; i++){
cin >> a[i];
ind.insert(i);
st.insert(mp(a[i] , i));
}
a[0] = a[n + 1] = -99999999999999;
ind.insert(0);
ind.insert(n + 1);
for(int i=1; i<=(n + 1) / 2; i++){
it = st.end();
it--;
ll val = (*it).f , cur = (*it).s;
st.erase(it);
ans += val;
ind.erase(ind.find(cur));
itt = ind.upper_bound(cur);
a[cur] = -a[cur];
if(itt != ind.end()){
a[cur] += a[(*itt)];
st.erase(mp(a[(*itt)] , (*itt)));
ind.erase(itt);
}
itt = ind.upper_bound(cur);
if(itt != ind.begin()){
itt--;
a[cur] += a[(*itt)];
st.erase(mp(a[(*itt)] , (*itt)));
ind.erase(itt);
}
st.insert(mp(a[cur] , cur));
ind.insert(cur);
cout << ans << endl;
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
632 KB |
Output is correct |
| 2 |
Correct |
9 ms |
632 KB |
Output is correct |
| 3 |
Correct |
9 ms |
636 KB |
Output is correct |
| 4 |
Correct |
9 ms |
632 KB |
Output is correct |
| 5 |
Correct |
9 ms |
632 KB |
Output is correct |
| 6 |
Correct |
9 ms |
632 KB |
Output is correct |
| 7 |
Correct |
9 ms |
632 KB |
Output is correct |
| 8 |
Correct |
9 ms |
632 KB |
Output is correct |
| 9 |
Correct |
8 ms |
632 KB |
Output is correct |
| 10 |
Correct |
9 ms |
632 KB |
Output is correct |
| 11 |
Correct |
9 ms |
632 KB |
Output is correct |
| 12 |
Correct |
9 ms |
632 KB |
Output is correct |
| 13 |
Correct |
9 ms |
632 KB |
Output is correct |
| 14 |
Correct |
9 ms |
636 KB |
Output is correct |
| 15 |
Correct |
9 ms |
632 KB |
Output is correct |
| 16 |
Correct |
9 ms |
632 KB |
Output is correct |
| 17 |
Correct |
9 ms |
632 KB |
Output is correct |
| 18 |
Correct |
9 ms |
632 KB |
Output is correct |
| 19 |
Correct |
8 ms |
632 KB |
Output is correct |
| 20 |
Correct |
8 ms |
632 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
632 KB |
Output is correct |
| 2 |
Correct |
9 ms |
632 KB |
Output is correct |
| 3 |
Correct |
9 ms |
636 KB |
Output is correct |
| 4 |
Correct |
9 ms |
632 KB |
Output is correct |
| 5 |
Correct |
9 ms |
632 KB |
Output is correct |
| 6 |
Correct |
9 ms |
632 KB |
Output is correct |
| 7 |
Correct |
9 ms |
632 KB |
Output is correct |
| 8 |
Correct |
9 ms |
632 KB |
Output is correct |
| 9 |
Correct |
8 ms |
632 KB |
Output is correct |
| 10 |
Correct |
9 ms |
632 KB |
Output is correct |
| 11 |
Correct |
9 ms |
632 KB |
Output is correct |
| 12 |
Correct |
9 ms |
632 KB |
Output is correct |
| 13 |
Correct |
9 ms |
632 KB |
Output is correct |
| 14 |
Correct |
9 ms |
636 KB |
Output is correct |
| 15 |
Correct |
9 ms |
632 KB |
Output is correct |
| 16 |
Correct |
9 ms |
632 KB |
Output is correct |
| 17 |
Correct |
9 ms |
632 KB |
Output is correct |
| 18 |
Correct |
9 ms |
632 KB |
Output is correct |
| 19 |
Correct |
8 ms |
632 KB |
Output is correct |
| 20 |
Correct |
8 ms |
632 KB |
Output is correct |
| 21 |
Correct |
905 ms |
27392 KB |
Output is correct |
| 22 |
Correct |
915 ms |
27416 KB |
Output is correct |
| 23 |
Correct |
902 ms |
27384 KB |
Output is correct |
| 24 |
Correct |
514 ms |
27128 KB |
Output is correct |
| 25 |
Correct |
499 ms |
27128 KB |
Output is correct |
| 26 |
Correct |
509 ms |
27220 KB |
Output is correct |
| 27 |
Correct |
516 ms |
27384 KB |
Output is correct |
| 28 |
Correct |
523 ms |
27512 KB |
Output is correct |
| 29 |
Correct |
489 ms |
27384 KB |
Output is correct |
| 30 |
Correct |
527 ms |
27384 KB |
Output is correct |
| 31 |
Correct |
520 ms |
27384 KB |
Output is correct |
| 32 |
Correct |
521 ms |
27384 KB |
Output is correct |
| 33 |
Correct |
682 ms |
27256 KB |
Output is correct |
| 34 |
Correct |
708 ms |
27212 KB |
Output is correct |
| 35 |
Correct |
674 ms |
27256 KB |
Output is correct |
| 36 |
Correct |
933 ms |
27260 KB |
Output is correct |
| 37 |
Correct |
933 ms |
27492 KB |
Output is correct |
| 38 |
Correct |
889 ms |
27256 KB |
Output is correct |
| 39 |
Correct |
510 ms |
27260 KB |
Output is correct |
| 40 |
Correct |
499 ms |
27256 KB |
Output is correct |
| 41 |
Correct |
497 ms |
27256 KB |
Output is correct |
| 42 |
Correct |
519 ms |
27208 KB |
Output is correct |
| 43 |
Correct |
508 ms |
27256 KB |
Output is correct |
| 44 |
Correct |
491 ms |
27384 KB |
Output is correct |
| 45 |
Correct |
531 ms |
27256 KB |
Output is correct |
| 46 |
Correct |
507 ms |
27256 KB |
Output is correct |
| 47 |
Correct |
536 ms |
27384 KB |
Output is correct |
| 48 |
Correct |
695 ms |
27132 KB |
Output is correct |
| 49 |
Correct |
680 ms |
27256 KB |
Output is correct |
| 50 |
Correct |
699 ms |
27124 KB |
Output is correct |
