#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6;
int n;
int a[maxn + 5];
int bit[maxn + 1];
void upd(int k, int v) {
for ( ; k <= maxn; k += (k & -k))
bit[k] += v;
}
int qry(int k) {
int ret = 0;
for (; k; k -= (k & -k))
ret += bit[k];
return ret;
}
int main() {
// freopen("main.in", "r", stdin);
cin >> n;
for (int i = 0; i < n; i++)
cin >> a[i];
// figure out nondecreasing sequences
int l = 0;
int ans = 0;
for (int i = 0; i < n; i++) {
// either a[i + 1] < a[i] or element in range
if ((i == n - 1 || a[i + 1] < a[i]) || (a[i + 1] > a[l] && qry(a[i + 1] - 1) - qry(a[l]))) {
for (int j = l; j <= i; j++) upd(a[j], 1);
ans++;
l = i + 1;
}
// if (i == n - 1 || a[i + 1] < a[i]) {
// // [l, i]
// int L = l;
// for (int j = l + 1; j <= i; j++) {
// // cout << l << ' ' << i << ' ' << L << ' ' << j << endl;
// // cout << qry(a[j]-1) << ' ' << qry(a[L]-1) << endl;
// if (a[j] > a[L] && qry(a[j] - 1) - qry(a[L])) {
// ans++;
// L = j + 1; j++;
// }
// }
// for (int k = l; k <= i; k++) {
// upd(a[k], 1);
// }
// ans++;
// l = i + 1;
// }
}
cout << ans << endl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
340 KB |
Output is correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 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 |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
428 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
340 KB |
Output is correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 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 |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
428 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
0 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 |
308 KB |
Output is correct |
| 21 |
Correct |
1 ms |
432 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
468 KB |
Output is correct |
| 26 |
Correct |
1 ms |
468 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
340 KB |
Output is correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 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 |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
428 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
0 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 |
308 KB |
Output is correct |
| 21 |
Correct |
1 ms |
432 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
468 KB |
Output is correct |
| 26 |
Correct |
1 ms |
468 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
1 ms |
304 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
0 ms |
308 KB |
Output is correct |
| 32 |
Correct |
1 ms |
440 KB |
Output is correct |
| 33 |
Correct |
1 ms |
340 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
1 ms |
304 KB |
Output is correct |
| 36 |
Correct |
1 ms |
340 KB |
Output is correct |
| 37 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 38 |
Correct |
1 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
1 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
340 KB |
Output is correct |
| 5 |
Correct |
0 ms |
340 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
0 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 |
0 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
428 KB |
Output is correct |
| 16 |
Correct |
1 ms |
340 KB |
Output is correct |
| 17 |
Correct |
0 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 |
308 KB |
Output is correct |
| 21 |
Correct |
1 ms |
432 KB |
Output is correct |
| 22 |
Correct |
0 ms |
340 KB |
Output is correct |
| 23 |
Correct |
0 ms |
340 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
0 ms |
468 KB |
Output is correct |
| 26 |
Correct |
1 ms |
468 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
1 ms |
304 KB |
Output is correct |
| 29 |
Correct |
1 ms |
340 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
0 ms |
308 KB |
Output is correct |
| 32 |
Correct |
1 ms |
440 KB |
Output is correct |
| 33 |
Correct |
1 ms |
340 KB |
Output is correct |
| 34 |
Correct |
1 ms |
340 KB |
Output is correct |
| 35 |
Correct |
1 ms |
304 KB |
Output is correct |
| 36 |
Correct |
1 ms |
340 KB |
Output is correct |
| 37 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 38 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 39 |
Correct |
154 ms |
5356 KB |
Output is correct |
| 40 |
Correct |
247 ms |
8816 KB |
Output is correct |
| 41 |
Correct |
117 ms |
4428 KB |
Output is correct |
| 42 |
Correct |
106 ms |
4116 KB |
Output is correct |
| 43 |
Correct |
78 ms |
3080 KB |
Output is correct |
| 44 |
Correct |
316 ms |
11168 KB |
Output is correct |
| 45 |
Correct |
302 ms |
10996 KB |
Output is correct |
| 46 |
Correct |
307 ms |
11196 KB |
Output is correct |
| 47 |
Correct |
298 ms |
10968 KB |
Output is correct |
| 48 |
Correct |
299 ms |
11028 KB |
Output is correct |
| 49 |
Correct |
312 ms |
15028 KB |
Output is correct |
| 50 |
Correct |
305 ms |
14872 KB |
Output is correct |
| 51 |
Correct |
341 ms |
14768 KB |
Output is correct |
| 52 |
Correct |
305 ms |
14796 KB |
Output is correct |
| 53 |
Correct |
308 ms |
14904 KB |
Output is correct |
| 54 |
Correct |
305 ms |
14816 KB |
Output is correct |
| 55 |
Correct |
318 ms |
14796 KB |
Output is correct |
| 56 |
Correct |
314 ms |
14860 KB |
Output is correct |
| 57 |
Correct |
314 ms |
14872 KB |
Output is correct |
| 58 |
Correct |
317 ms |
14956 KB |
Output is correct |
| 59 |
Correct |
310 ms |
14948 KB |
Output is correct |
| 60 |
Correct |
311 ms |
14772 KB |
Output is correct |
| 61 |
Correct |
316 ms |
14912 KB |
Output is correct |
| 62 |
Correct |
308 ms |
14808 KB |
Output is correct |
