#include "bits/stdc++.h"
using namespace std;
const int maxn = 2e5 + 5;
int n, a[maxn];
long long f[maxn], g[maxn];
long long pref[maxn], suf[maxn];
long long b[maxn], c[maxn];
void solve() {
cin >> n;
for(int i = 1; i <= n; ++i) {
cin >> a[i];
}
for(int i = 1; i <= n; ++i) {
pref[i] = max(pref[i - 1] + 1, 1ll * a[i]);
b[i] = max(0ll, pref[i] - a[i]);
f[i] = f[i - 1] + max(0ll, b[i] - b[i - 1]);
}
for(int i = n; i; --i) {
suf[i] = max(suf[i + 1] + 1, 1ll * a[i]);
c[i] = max(0ll, suf[i] - a[i]);
g[i] = g[i + 1] + max(0ll, c[i] - c[i + 1]);
}
long long ans = min(f[n], g[1]);
for(int i = 1; i < n; ++i) {
ans = min(ans, max(f[i], g[i]));
}
cout << ans;
}
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
solve();
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2520 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 8 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2556 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
0 ms |
2652 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 2 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 3 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 4 |
Correct |
0 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 6 |
Correct |
0 ms |
2520 KB |
Output is correct |
| 7 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 8 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 9 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 10 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 11 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 13 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 14 |
Correct |
1 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 16 |
Correct |
1 ms |
2556 KB |
Output is correct |
| 17 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 18 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 19 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 20 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 21 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
1 ms |
2652 KB |
Output is correct |
| 23 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
0 ms |
2652 KB |
Output is correct |
| 25 |
Correct |
1 ms |
2904 KB |
Output is correct |
| 26 |
Correct |
15 ms |
12380 KB |
Output is correct |
| 27 |
Correct |
14 ms |
12500 KB |
Output is correct |
| 28 |
Correct |
20 ms |
12492 KB |
Output is correct |
| 29 |
Correct |
14 ms |
12380 KB |
Output is correct |
| 30 |
Correct |
18 ms |
11736 KB |
Output is correct |
| 31 |
Correct |
14 ms |
12380 KB |
Output is correct |
| 32 |
Correct |
14 ms |
12380 KB |
Output is correct |
| 33 |
Correct |
14 ms |
12316 KB |
Output is correct |
| 34 |
Correct |
14 ms |
12368 KB |
Output is correct |
| 35 |
Correct |
12 ms |
11612 KB |
Output is correct |
| 36 |
Correct |
15 ms |
11868 KB |
Output is correct |
| 37 |
Correct |
12 ms |
11648 KB |
Output is correct |
| 38 |
Correct |
18 ms |
12468 KB |
Output is correct |
| 39 |
Correct |
19 ms |
12508 KB |
Output is correct |
| 40 |
Correct |
17 ms |
12380 KB |
Output is correct |
| 41 |
Correct |
15 ms |
12336 KB |
Output is correct |
| 42 |
Correct |
14 ms |
12380 KB |
Output is correct |
| 43 |
Correct |
17 ms |
12440 KB |
Output is correct |
| 44 |
Correct |
16 ms |
12380 KB |
Output is correct |
| 45 |
Correct |
16 ms |
12380 KB |
Output is correct |
| 46 |
Correct |
18 ms |
12376 KB |
Output is correct |
| 47 |
Correct |
14 ms |
12376 KB |
Output is correct |
| 48 |
Correct |
15 ms |
12376 KB |
Output is correct |
