#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pb push_back
const int MAXN = (int)2e5 + 5;
int N;
ll a[MAXN], l[MAXN], r[MAXN], maxL[MAXN], maxR[MAXN];
int main()
{
cin >> N;
for(int i = 1; i <= N; i++)
cin >> a[i];
for(int i = 1; i <= N; i++)
{
ll free = l[i - 1] - a[i - 1];
l[i] = max(a[i] + free, l[i - 1] + 1);
}
for(int i = 1; i <= N; i++)
{
l[i] -= a[i];
maxL[i] = max(maxL[i - 1], l[i]);
}
for(int i = N; i >= 1; i--)
{
ll free = r[i + 1] - a[i + 1];
r[i] = max(a[i] + free, r[i + 1] + 1);
}
for(int i = N; i >= 1; i--)
{
r[i] -= a[i];
maxR[i] = max(maxR[i + 1], r[i]);
}
ll ans = maxL[N];
for(int i = 1; i < N; i++)
if(l[i] + a[i] != r[i + 1] + a[i + 1])
ans = min(ans, max(maxL[i], maxR[i + 1]));
cout << ans << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
2 ms |
332 KB |
Output is correct |
| 6 |
Correct |
3 ms |
308 KB |
Output is correct |
| 7 |
Correct |
3 ms |
332 KB |
Output is correct |
| 8 |
Correct |
2 ms |
332 KB |
Output is correct |
| 9 |
Correct |
2 ms |
332 KB |
Output is correct |
| 10 |
Correct |
2 ms |
332 KB |
Output is correct |
| 11 |
Correct |
2 ms |
332 KB |
Output is correct |
| 12 |
Correct |
2 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 |
304 KB |
Output is correct |
| 16 |
Correct |
2 ms |
316 KB |
Output is correct |
| 17 |
Correct |
2 ms |
332 KB |
Output is correct |
| 18 |
Correct |
2 ms |
336 KB |
Output is correct |
| 19 |
Correct |
2 ms |
332 KB |
Output is correct |
| 20 |
Correct |
2 ms |
332 KB |
Output is correct |
| 21 |
Correct |
2 ms |
332 KB |
Output is correct |
| 22 |
Correct |
2 ms |
332 KB |
Output is correct |
| 23 |
Correct |
3 ms |
332 KB |
Output is correct |
| 24 |
Correct |
2 ms |
332 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
2 ms |
332 KB |
Output is correct |
| 6 |
Correct |
3 ms |
308 KB |
Output is correct |
| 7 |
Correct |
3 ms |
332 KB |
Output is correct |
| 8 |
Correct |
2 ms |
332 KB |
Output is correct |
| 9 |
Correct |
2 ms |
332 KB |
Output is correct |
| 10 |
Correct |
2 ms |
332 KB |
Output is correct |
| 11 |
Correct |
2 ms |
332 KB |
Output is correct |
| 12 |
Correct |
2 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 |
304 KB |
Output is correct |
| 16 |
Correct |
2 ms |
316 KB |
Output is correct |
| 17 |
Correct |
2 ms |
332 KB |
Output is correct |
| 18 |
Correct |
2 ms |
336 KB |
Output is correct |
| 19 |
Correct |
2 ms |
332 KB |
Output is correct |
| 20 |
Correct |
2 ms |
332 KB |
Output is correct |
| 21 |
Correct |
2 ms |
332 KB |
Output is correct |
| 22 |
Correct |
2 ms |
332 KB |
Output is correct |
| 23 |
Correct |
3 ms |
332 KB |
Output is correct |
| 24 |
Correct |
2 ms |
332 KB |
Output is correct |
| 25 |
Correct |
2 ms |
332 KB |
Output is correct |
| 26 |
Correct |
94 ms |
8204 KB |
Output is correct |
| 27 |
Correct |
98 ms |
8120 KB |
Output is correct |
| 28 |
Correct |
100 ms |
8184 KB |
Output is correct |
| 29 |
Correct |
98 ms |
8184 KB |
Output is correct |
| 30 |
Correct |
72 ms |
8212 KB |
Output is correct |
| 31 |
Correct |
95 ms |
8132 KB |
Output is correct |
| 32 |
Correct |
97 ms |
8176 KB |
Output is correct |
| 33 |
Correct |
96 ms |
8196 KB |
Output is correct |
| 34 |
Correct |
100 ms |
8156 KB |
Output is correct |
| 35 |
Correct |
69 ms |
8188 KB |
Output is correct |
| 36 |
Correct |
74 ms |
8160 KB |
Output is correct |
| 37 |
Correct |
72 ms |
8184 KB |
Output is correct |
| 38 |
Correct |
92 ms |
8136 KB |
Output is correct |
| 39 |
Correct |
94 ms |
8156 KB |
Output is correct |
| 40 |
Correct |
98 ms |
8176 KB |
Output is correct |
| 41 |
Correct |
94 ms |
8132 KB |
Output is correct |
| 42 |
Correct |
87 ms |
8188 KB |
Output is correct |
| 43 |
Correct |
99 ms |
8196 KB |
Output is correct |
| 44 |
Correct |
98 ms |
8144 KB |
Output is correct |
| 45 |
Correct |
94 ms |
8180 KB |
Output is correct |
| 46 |
Correct |
94 ms |
8232 KB |
Output is correct |
| 47 |
Correct |
95 ms |
8108 KB |
Output is correct |
| 48 |
Correct |
94 ms |
8188 KB |
Output is correct |
