#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int, int> pii;
const int MXN = 200005;
int n, a[MXN], d[MXN];
int getANS() {
int l = 0, r = n - 2, ans = 0;
while (l < n - 1 && d[l] > 0) l++;
while (r >= 0 && d[r] < 0) r--;
if (l == n - 1 || r == -1) return 0;
while (l < r) {
int small = min(1 - d[l], d[r] + 1);
d[l] += small;
d[r] -= small;
ans += small;
while (l < n - 1 && d[l] > 0) l++;
while (r >= 0 && d[r] < 0) r--;
}
if (l == r && d[l] == 0) ans++;
return ans;
}
int32_t main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin >> n;
for (int i = 0; i < n; i++) cin >> a[i];
for (int i = 1; i < n; i++) d[i - 1] = a[i] - a[i - 1];
cout << getANS() << endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 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 |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 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 |
340 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 |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
212 KB |
Output is correct |
| 3 |
Correct |
0 ms |
212 KB |
Output is correct |
| 4 |
Correct |
0 ms |
212 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 |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 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 |
340 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 |
340 KB |
Output is correct |
| 26 |
Correct |
21 ms |
3344 KB |
Output is correct |
| 27 |
Correct |
21 ms |
3408 KB |
Output is correct |
| 28 |
Correct |
21 ms |
3364 KB |
Output is correct |
| 29 |
Correct |
20 ms |
3404 KB |
Output is correct |
| 30 |
Correct |
17 ms |
3372 KB |
Output is correct |
| 31 |
Correct |
24 ms |
3344 KB |
Output is correct |
| 32 |
Correct |
22 ms |
3412 KB |
Output is correct |
| 33 |
Correct |
24 ms |
3408 KB |
Output is correct |
| 34 |
Correct |
20 ms |
3388 KB |
Output is correct |
| 35 |
Correct |
16 ms |
3420 KB |
Output is correct |
| 36 |
Correct |
17 ms |
3332 KB |
Output is correct |
| 37 |
Correct |
18 ms |
3412 KB |
Output is correct |
| 38 |
Correct |
21 ms |
3372 KB |
Output is correct |
| 39 |
Correct |
22 ms |
3412 KB |
Output is correct |
| 40 |
Correct |
19 ms |
3332 KB |
Output is correct |
| 41 |
Correct |
20 ms |
3380 KB |
Output is correct |
| 42 |
Correct |
19 ms |
3376 KB |
Output is correct |
| 43 |
Correct |
21 ms |
3440 KB |
Output is correct |
| 44 |
Correct |
20 ms |
3344 KB |
Output is correct |
| 45 |
Correct |
19 ms |
3404 KB |
Output is correct |
| 46 |
Correct |
19 ms |
3412 KB |
Output is correct |
| 47 |
Correct |
20 ms |
3348 KB |
Output is correct |
| 48 |
Correct |
22 ms |
3328 KB |
Output is correct |
