#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vi vector<ll>
#define vvi vector<vector<ll>>
#define vs vector<string>
#define vc vector<char>
#define vb vector<bool>
#define vp vector<pair<ll, ll>>
#define pp pair<ll, ll>
#define qi queue<ll>
#define qp queue<pp>
#define pqi priority_queue<ll>
#define pqp priority_queue<pp>
#define mi map<ll, ll>
#define mpi map<pp, ll>
#define mip map<ll, pp>
#define mpp map<pp, pp>
#define mb map<ll, bool>
#define si set<ll>
#define sp set<pp>
#define mod 1000000007
#define rep(a, b) for(int a = 0; a < (b); a++)
#define rep2(a, b) for(int a = 1; a < (b); a++)
#define inf 1000000000000000000
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n;
cin >> n;
vi A(n);
rep(i, n) {
cin >> A[i];
}
int l = 0; int r = n - 1;
ll ans = 0;
while (l < r) {
while (l + 1 < n && A[l] < A[l + 1]) {
l++;
}
while (r-1 >= 0 && A[r] < A[r - 1]) {
r--;
}
if (l + 1 == r && A[l] == A[r]) {
ans++;
break;
}
if (!(l < r)) {
break;
}
int xl = A[l] - A[l + 1] + 1;
int xr = A[r] - A[r - 1] + 1;
int xmin = min(xl, xr);
A[l] -= xmin;
A[r] -= xmin;
ans += xmin;
}
cout << ans << endl;
}
| # |
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 |
0 ms |
600 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
1 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
504 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
0 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 |
0 ms |
600 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
1 ms |
344 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
0 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
504 KB |
Output is correct |
| 21 |
Correct |
1 ms |
344 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
0 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
348 KB |
Output is correct |
| 25 |
Correct |
1 ms |
344 KB |
Output is correct |
| 26 |
Correct |
17 ms |
2028 KB |
Output is correct |
| 27 |
Correct |
16 ms |
1880 KB |
Output is correct |
| 28 |
Correct |
15 ms |
1884 KB |
Output is correct |
| 29 |
Correct |
15 ms |
2036 KB |
Output is correct |
| 30 |
Correct |
12 ms |
1884 KB |
Output is correct |
| 31 |
Correct |
15 ms |
2036 KB |
Output is correct |
| 32 |
Correct |
16 ms |
1884 KB |
Output is correct |
| 33 |
Correct |
15 ms |
1884 KB |
Output is correct |
| 34 |
Correct |
15 ms |
1884 KB |
Output is correct |
| 35 |
Correct |
12 ms |
1884 KB |
Output is correct |
| 36 |
Correct |
13 ms |
1884 KB |
Output is correct |
| 37 |
Correct |
14 ms |
2032 KB |
Output is correct |
| 38 |
Correct |
17 ms |
2024 KB |
Output is correct |
| 39 |
Correct |
16 ms |
1884 KB |
Output is correct |
| 40 |
Correct |
16 ms |
1884 KB |
Output is correct |
| 41 |
Correct |
16 ms |
1884 KB |
Output is correct |
| 42 |
Correct |
15 ms |
1880 KB |
Output is correct |
| 43 |
Correct |
16 ms |
1880 KB |
Output is correct |
| 44 |
Correct |
16 ms |
2136 KB |
Output is correct |
| 45 |
Correct |
17 ms |
2080 KB |
Output is correct |
| 46 |
Correct |
16 ms |
1880 KB |
Output is correct |
| 47 |
Correct |
16 ms |
2036 KB |
Output is correct |
| 48 |
Correct |
16 ms |
1884 KB |
Output is correct |
