#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const int MAXN = 200000;
ll a[MAXN+5];
ll pref[MAXN+5];
ll suf[MAXN+5];
ll hpref[MAXN+5];
ll hsuf[MAXN+5];
const ll INF = 1000000000000000000LL;
int main(){
ios_base::sync_with_stdio(false), cin.tie(0);
cout.precision(10);
cout << fixed;
int n;
cin >> n;
for(int i=1; i<=n; i++){
cin >> a[i];
}
for(int i=1; i<=n; i++){
hpref[i] = max(hpref[i-1] + 1, a[i] + pref[i-1]);
pref[i] = pref[i-1] + max(0LL, hpref[i] - (a[i] + pref[i-1]));
}
for(int i=n; i>=1; i--){
hsuf[i] = max(hsuf[i+1] + 1, a[i] + suf[i+1]);
suf[i] = suf[i+1] + max(0LL, hsuf[i] - (a[i] + suf[i+1]));
}
ll res = INF;
for(int i=1; i<=n; i++){
res = min(res, max(pref[i-1], max(suf[i+1], max(hpref[i-1], hsuf[i+1]) + 1 - a[i])));
}
cout << res << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
2 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
336 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| 22 |
Correct |
1 ms |
328 KB |
Output is correct |
| 23 |
Correct |
1 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
332 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
2 ms |
332 KB |
Output is correct |
| 8 |
Correct |
1 ms |
332 KB |
Output is correct |
| 9 |
Correct |
1 ms |
332 KB |
Output is correct |
| 10 |
Correct |
1 ms |
332 KB |
Output is correct |
| 11 |
Correct |
1 ms |
332 KB |
Output is correct |
| 12 |
Correct |
1 ms |
332 KB |
Output is correct |
| 13 |
Correct |
1 ms |
332 KB |
Output is correct |
| 14 |
Correct |
1 ms |
332 KB |
Output is correct |
| 15 |
Correct |
1 ms |
332 KB |
Output is correct |
| 16 |
Correct |
1 ms |
332 KB |
Output is correct |
| 17 |
Correct |
1 ms |
336 KB |
Output is correct |
| 18 |
Correct |
1 ms |
332 KB |
Output is correct |
| 19 |
Correct |
1 ms |
332 KB |
Output is correct |
| 20 |
Correct |
1 ms |
332 KB |
Output is correct |
| 21 |
Correct |
1 ms |
332 KB |
Output is correct |
| 22 |
Correct |
1 ms |
328 KB |
Output is correct |
| 23 |
Correct |
1 ms |
332 KB |
Output is correct |
| 24 |
Correct |
1 ms |
332 KB |
Output is correct |
| 25 |
Correct |
1 ms |
332 KB |
Output is correct |
| 26 |
Correct |
31 ms |
9996 KB |
Output is correct |
| 27 |
Correct |
32 ms |
9940 KB |
Output is correct |
| 28 |
Correct |
31 ms |
9976 KB |
Output is correct |
| 29 |
Correct |
32 ms |
10064 KB |
Output is correct |
| 30 |
Correct |
28 ms |
9308 KB |
Output is correct |
| 31 |
Correct |
30 ms |
9996 KB |
Output is correct |
| 32 |
Correct |
39 ms |
10052 KB |
Output is correct |
| 33 |
Correct |
30 ms |
10060 KB |
Output is correct |
| 34 |
Correct |
31 ms |
9976 KB |
Output is correct |
| 35 |
Correct |
25 ms |
9292 KB |
Output is correct |
| 36 |
Correct |
25 ms |
9280 KB |
Output is correct |
| 37 |
Correct |
25 ms |
9380 KB |
Output is correct |
| 38 |
Correct |
30 ms |
9956 KB |
Output is correct |
| 39 |
Correct |
30 ms |
9968 KB |
Output is correct |
| 40 |
Correct |
30 ms |
9968 KB |
Output is correct |
| 41 |
Correct |
30 ms |
10020 KB |
Output is correct |
| 42 |
Correct |
29 ms |
9844 KB |
Output is correct |
| 43 |
Correct |
30 ms |
10068 KB |
Output is correct |
| 44 |
Correct |
31 ms |
9924 KB |
Output is correct |
| 45 |
Correct |
30 ms |
10028 KB |
Output is correct |
| 46 |
Correct |
30 ms |
10116 KB |
Output is correct |
| 47 |
Correct |
36 ms |
9984 KB |
Output is correct |
| 48 |
Correct |
30 ms |
10052 KB |
Output is correct |
