#include <bits/stdc++.h>
using namespace std;
const long long maxn = 2e5 + 12, inf = 1e17 ;
long long n, a[maxn], sum[maxn][2], nat[maxn][2];
int main(){
ios_base::sync_with_stdio(false), cin.tie(0);
cin >> n;
for(int i = 0; i < n; i++)
cin >> a[i + 1];
for(int i = 1; i <= n; i++){
sum[i][0] = sum[i - 1][0] + (a[i - 1] + 1 - a[i]) * (a[i - 1] + 1 - a[i] >= 0);
nat[i][0] = max(nat[i - 1][0] + 1, a[i]);
}
for(int i = n; i >= 1; i--){
sum[i][1] = sum[i + 1][1] + (a[i + 1] + 1 - a[i]) * (a[i + 1] + 1 - a[i] >= 0);
nat[i][1] = max(nat[i + 1][1] + 1, a[i]);
}
long long ans = inf;
for(int i = 1; i <= n; i++){
long long mx = max(sum[i - 1][0], sum[i + 1][1]);
long long s = sum[i + 1][1] + a[i + 1], f = sum[i - 1][0] + a[i - 1];
ans = min(ans, mx + max(max(f, s) + 1 - mx - a[i], 0ll));
// cout << i << ' ' << f << ' ' << s << ' ' << sum[i - 1][0] << ' ' << sum[i + 1][1] << endl;
// cout << ans << endl;
}
cout << ans << endl;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
324 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
368 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
336 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
336 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 |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
324 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
368 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
336 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
336 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 |
1 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
1 ms |
344 KB |
Output is correct |
| 26 |
Correct |
24 ms |
10060 KB |
Output is correct |
| 27 |
Correct |
25 ms |
10064 KB |
Output is correct |
| 28 |
Correct |
25 ms |
10060 KB |
Output is correct |
| 29 |
Correct |
25 ms |
10024 KB |
Output is correct |
| 30 |
Correct |
24 ms |
9368 KB |
Output is correct |
| 31 |
Correct |
27 ms |
10036 KB |
Output is correct |
| 32 |
Correct |
24 ms |
10060 KB |
Output is correct |
| 33 |
Correct |
25 ms |
10060 KB |
Output is correct |
| 34 |
Correct |
27 ms |
10004 KB |
Output is correct |
| 35 |
Correct |
19 ms |
9244 KB |
Output is correct |
| 36 |
Correct |
20 ms |
9396 KB |
Output is correct |
| 37 |
Correct |
20 ms |
9292 KB |
Output is correct |
| 38 |
Correct |
24 ms |
10072 KB |
Output is correct |
| 39 |
Correct |
24 ms |
10012 KB |
Output is correct |
| 40 |
Correct |
26 ms |
9964 KB |
Output is correct |
| 41 |
Correct |
26 ms |
10068 KB |
Output is correct |
| 42 |
Correct |
24 ms |
9804 KB |
Output is correct |
| 43 |
Correct |
33 ms |
10056 KB |
Output is correct |
| 44 |
Correct |
36 ms |
9980 KB |
Output is correct |
| 45 |
Correct |
27 ms |
9964 KB |
Output is correct |
| 46 |
Correct |
24 ms |
10000 KB |
Output is correct |
| 47 |
Correct |
25 ms |
10072 KB |
Output is correct |
| 48 |
Correct |
25 ms |
10028 KB |
Output is correct |
