#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;
using ll = long long;
int n;
vector<ll> a, pref, suff;
int main(){
cin >> n;
a.resize(n);
pref.resize(n, 0);
suff.resize(n, 0);
for(int i = 0; i < n; i++) cin >> a[i];
for(int i = 1; i < n; i++) if(a[i - 1] >= a[i]) pref[i] = a[i - 1] - a[i] + 1;
for(int i = n - 2; i >= 0; i--) if(a[i] <= a[i + 1]) suff[i] = a[i + 1] - a[i] + 1;
for(int i = 1; i < n; i++) pref[i] += pref[i - 1];
for(int i = n - 2; i >= 0; i--) suff[i] += suff[i + 1];
if(pref[n - 1] == 0 || suff[0] == 0){
cout << 0; return 0;
}
ll ans = 1e14;
for(int i = 0; i < n; i++){
ans = min(ans, max(pref[i], suff[i]));
}
cout << ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
448 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
348 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
1 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
348 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
448 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
1 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
348 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
348 KB |
Output is correct |
| 26 |
Correct |
49 ms |
6908 KB |
Output is correct |
| 27 |
Correct |
49 ms |
7028 KB |
Output is correct |
| 28 |
Correct |
48 ms |
6996 KB |
Output is correct |
| 29 |
Correct |
53 ms |
7024 KB |
Output is correct |
| 30 |
Correct |
39 ms |
6232 KB |
Output is correct |
| 31 |
Correct |
49 ms |
6996 KB |
Output is correct |
| 32 |
Correct |
48 ms |
7004 KB |
Output is correct |
| 33 |
Correct |
48 ms |
6912 KB |
Output is correct |
| 34 |
Correct |
56 ms |
7036 KB |
Output is correct |
| 35 |
Correct |
32 ms |
6144 KB |
Output is correct |
| 36 |
Correct |
34 ms |
6228 KB |
Output is correct |
| 37 |
Correct |
36 ms |
6140 KB |
Output is correct |
| 38 |
Correct |
48 ms |
6908 KB |
Output is correct |
| 39 |
Correct |
57 ms |
7252 KB |
Output is correct |
| 40 |
Correct |
49 ms |
6996 KB |
Output is correct |
| 41 |
Correct |
47 ms |
7000 KB |
Output is correct |
| 42 |
Correct |
44 ms |
6788 KB |
Output is correct |
| 43 |
Correct |
49 ms |
6908 KB |
Output is correct |
| 44 |
Correct |
47 ms |
6996 KB |
Output is correct |
| 45 |
Correct |
50 ms |
6940 KB |
Output is correct |
| 46 |
Correct |
48 ms |
6996 KB |
Output is correct |
| 47 |
Correct |
48 ms |
7004 KB |
Output is correct |
| 48 |
Correct |
48 ms |
6996 KB |
Output is correct |
