| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 634050 |
2022-08-23T18:06:13 Z |
izanbf |
Hacker (BOI15_hac) |
C++14 |
|
374 ms |
18428 KB |
#include <bits/stdc++.h>
using namespace std;
#define D(x) cerr << #x << " = " << x << ", "
using vi = vector<int>;
using vvi = vector<vi>;
vi compute_ksums(const vi& a, int k) {
int n = a.size();
vi v(2*n);
for (int i = 0; i < n; ++i) {
v[i] = v[n+i] = a[i];
}
vi pre(2*n+1); // pre[i+1] = v[0]+...+v[i]
for (int i = 0; i < 2*n; ++i) {
pre[i+1] = pre[i] + v[i];
}
vi ksums(n); // ksums[i] = v[i] + ... + v[i+k-1]
for (int i = 0; i < n; ++i) {
ksums[i] = pre[i+k] - pre[i];
}
return ksums;
}
int main() {
cin.tie(0);
ios::sync_with_stdio(false);
int n;
cin >> n;
int k = n/2; // range of the deffender
int sum = 0;
vi v(n);
for (int i = 0; i < n; ++i) {
cin >> v[i];
sum += v[i];
}
vi ksums = compute_ksums(v, k);
multiset<int> s;
int l = 1;
int r = n-k;
int ans = 0;
for (int i = l; i <= r; ++i) {
s.insert(-ksums[i]);
}
for (int i = 0; i < n; ++i) {
int best = -(*s.begin());
ans = max(ans, sum-best);
r = (r+1)%n;
s.insert(-ksums[r]);
s.erase(s.find(-ksums[l]));
l = (l+1)%n;
}
/*int ans = 0;
for (int i = 0; i < n; ++i) {
int best = 0;
for (int j = 0; j < n; ++j) {
int l = j;
int r = j+k-1;
if ((i < l or i > r) and (n+i < l or n+i > r)) {
best = max(best, ksums[j]);
}
}
ans = max(ans, sum-best);
}*/
cout << ans << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
324 KB |
Output is correct |
| 8 |
Correct |
1 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
324 KB |
Output is correct |
| 8 |
Correct |
1 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
500 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
468 KB |
Output is correct |
| 26 |
Correct |
2 ms |
468 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
316 KB |
Output is correct |
| 29 |
Correct |
1 ms |
324 KB |
Output is correct |
| 30 |
Correct |
2 ms |
464 KB |
Output is correct |
| 31 |
Correct |
2 ms |
468 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
2 ms |
464 KB |
Output is correct |
| 4 |
Correct |
30 ms |
3180 KB |
Output is correct |
| 5 |
Correct |
104 ms |
7256 KB |
Output is correct |
| 6 |
Correct |
159 ms |
9268 KB |
Output is correct |
| 7 |
Correct |
136 ms |
11080 KB |
Output is correct |
| 8 |
Correct |
374 ms |
18148 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
1 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
324 KB |
Output is correct |
| 8 |
Correct |
1 ms |
320 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
212 KB |
Output is correct |
| 11 |
Correct |
1 ms |
316 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
212 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
340 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
500 KB |
Output is correct |
| 24 |
Correct |
2 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
468 KB |
Output is correct |
| 26 |
Correct |
2 ms |
468 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
316 KB |
Output is correct |
| 29 |
Correct |
1 ms |
324 KB |
Output is correct |
| 30 |
Correct |
2 ms |
464 KB |
Output is correct |
| 31 |
Correct |
2 ms |
468 KB |
Output is correct |
| 32 |
Correct |
0 ms |
212 KB |
Output is correct |
| 33 |
Correct |
1 ms |
212 KB |
Output is correct |
| 34 |
Correct |
2 ms |
464 KB |
Output is correct |
| 35 |
Correct |
30 ms |
3180 KB |
Output is correct |
| 36 |
Correct |
104 ms |
7256 KB |
Output is correct |
| 37 |
Correct |
159 ms |
9268 KB |
Output is correct |
| 38 |
Correct |
136 ms |
11080 KB |
Output is correct |
| 39 |
Correct |
374 ms |
18148 KB |
Output is correct |
| 40 |
Correct |
4 ms |
596 KB |
Output is correct |
| 41 |
Correct |
10 ms |
916 KB |
Output is correct |
| 42 |
Correct |
12 ms |
1408 KB |
Output is correct |
| 43 |
Correct |
90 ms |
7460 KB |
Output is correct |
| 44 |
Correct |
281 ms |
18152 KB |
Output is correct |
| 45 |
Correct |
39 ms |
3764 KB |
Output is correct |
| 46 |
Correct |
186 ms |
11016 KB |
Output is correct |
| 47 |
Correct |
308 ms |
18216 KB |
Output is correct |
| 48 |
Correct |
237 ms |
18428 KB |
Output is correct |
| 49 |
Correct |
223 ms |
17560 KB |
Output is correct |
| 50 |
Correct |
212 ms |
17528 KB |
Output is correct |
