#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e6;
int n;
int a[MAXN + 5];
int b[MAXN + 5];
int A[MAXN + 5][25], B[MAXN + 5][25];
int le[MAXN + 5];
int dp[MAXN + 5];
int BI[MAXN + 5];
int datvla (int l, int r){
if (l > r)
return n + 1;
int x = 0, y = 1;
while (y * 2 < r - l + 1){
x++;
y *= 2;
}
return min (A[l][x], B[r][x]);
}
int main()
{
cin>>n;
for (int i = 1; i <= n; i++)
cin>>a[i];
for (int i = 1; i <= MAXN; i++)
b[i] = n + 1;
for (int i = n; i >= 1; i--)
b[a[i]] = i;
for (int i = 1; i <= MAXN; i++){
A[i][0] = b[i];
B[i][0] = b[i];
}
for (int i = 1; i < 20; i++)
for (int j = 1; j <= MAXN; j++){
A[j][i] = A[j][i - 1];
if (j + (1<<(i - 1)) <= MAXN)
A[j][i] = min (A[j][i], A[j + (1<<(i - 1))][i - 1]);
B[j][i] = B[j][i - 1];
if (j - (1<<(i - 1)) >= 1)
B[j][i] = min (B[j][i], B[j - (1<<(i - 1))][i - 1]);
}
le[1] = 1;
for (int i = 2; i <= n; i++){
le[i] = i;
if (a[i] >= a[i - 1])
le[i] = le[i - 1];
}
dp[1] = 1;
for (int i = 2; i <= n; i++){
int I = i;
for (int j = 19; j >= 0; j--){
if (I - (1<<j) < le[i])
continue;
if (datvla (a[I - (1<<j)] + 1, a[i] - 1) >= I - (1<<j))
I -= (1<<j);
}
dp[i] = dp[I - 1] + 1;
}
cout<<dp[n]<<endl;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
680 ms |
200052 KB |
Output is correct |
2 |
Correct |
711 ms |
199972 KB |
Output is correct |
3 |
Correct |
785 ms |
199972 KB |
Output is correct |
4 |
Correct |
781 ms |
199972 KB |
Output is correct |
5 |
Correct |
787 ms |
199984 KB |
Output is correct |
6 |
Correct |
836 ms |
200056 KB |
Output is correct |
7 |
Correct |
829 ms |
199928 KB |
Output is correct |
8 |
Correct |
815 ms |
200056 KB |
Output is correct |
9 |
Correct |
826 ms |
200076 KB |
Output is correct |
10 |
Correct |
808 ms |
199976 KB |
Output is correct |
11 |
Correct |
782 ms |
199976 KB |
Output is correct |
12 |
Correct |
797 ms |
199976 KB |
Output is correct |
13 |
Correct |
789 ms |
199972 KB |
Output is correct |
14 |
Correct |
787 ms |
200056 KB |
Output is correct |
15 |
Correct |
791 ms |
200108 KB |
Output is correct |
16 |
Correct |
773 ms |
200064 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
680 ms |
200052 KB |
Output is correct |
2 |
Correct |
711 ms |
199972 KB |
Output is correct |
3 |
Correct |
785 ms |
199972 KB |
Output is correct |
4 |
Correct |
781 ms |
199972 KB |
Output is correct |
5 |
Correct |
787 ms |
199984 KB |
Output is correct |
6 |
Correct |
836 ms |
200056 KB |
Output is correct |
7 |
Correct |
829 ms |
199928 KB |
Output is correct |
8 |
Correct |
815 ms |
200056 KB |
Output is correct |
9 |
Correct |
826 ms |
200076 KB |
Output is correct |
10 |
Correct |
808 ms |
199976 KB |
Output is correct |
11 |
Correct |
782 ms |
199976 KB |
Output is correct |
12 |
Correct |
797 ms |
199976 KB |
Output is correct |
13 |
Correct |
789 ms |
199972 KB |
Output is correct |
14 |
Correct |
787 ms |
200056 KB |
Output is correct |
15 |
Correct |
791 ms |
200108 KB |
Output is correct |
16 |
Correct |
773 ms |
200064 KB |
Output is correct |
17 |
Correct |
788 ms |
200056 KB |
Output is correct |
18 |
Correct |
781 ms |
200056 KB |
Output is correct |
19 |
Correct |
783 ms |
200056 KB |
Output is correct |
20 |
Correct |
793 ms |
199928 KB |
Output is correct |
21 |
Correct |
771 ms |
199968 KB |
Output is correct |
22 |
Correct |
789 ms |
200056 KB |
Output is correct |
23 |
Correct |
784 ms |
200056 KB |
Output is correct |
24 |
Correct |
796 ms |
200184 KB |
Output is correct |
25 |
Correct |
798 ms |
199928 KB |
Output is correct |
26 |
Correct |
785 ms |
200028 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
680 ms |
200052 KB |
Output is correct |
2 |
Correct |
711 ms |
199972 KB |
Output is correct |
3 |
Correct |
785 ms |
199972 KB |
Output is correct |
4 |
Correct |
781 ms |
199972 KB |
Output is correct |
5 |
Correct |
787 ms |
199984 KB |
Output is correct |
6 |
Correct |
836 ms |
200056 KB |
Output is correct |
7 |
Correct |
829 ms |
199928 KB |
Output is correct |
8 |
Correct |
815 ms |
200056 KB |
Output is correct |
9 |
Correct |
826 ms |
200076 KB |
Output is correct |
10 |
Correct |
808 ms |
199976 KB |
Output is correct |
11 |
Correct |
782 ms |
199976 KB |
Output is correct |
12 |
Correct |
797 ms |
199976 KB |
Output is correct |
13 |
Correct |
789 ms |
199972 KB |
Output is correct |
14 |
Correct |
787 ms |
200056 KB |
Output is correct |
15 |
Correct |
791 ms |
200108 KB |
Output is correct |
16 |
Correct |
773 ms |
200064 KB |
Output is correct |
17 |
Correct |
788 ms |
200056 KB |
Output is correct |
18 |
Correct |
781 ms |
200056 KB |
Output is correct |
19 |
Correct |
783 ms |
200056 KB |
Output is correct |
20 |
Correct |
793 ms |
199928 KB |
Output is correct |
21 |
Correct |
771 ms |
199968 KB |
Output is correct |
22 |
Correct |
789 ms |
200056 KB |
Output is correct |
23 |
Correct |
784 ms |
200056 KB |
Output is correct |
24 |
Correct |
796 ms |
200184 KB |
Output is correct |
25 |
Correct |
798 ms |
199928 KB |
Output is correct |
26 |
Correct |
785 ms |
200028 KB |
Output is correct |
27 |
Correct |
780 ms |
199932 KB |
Output is correct |
28 |
Correct |
771 ms |
199980 KB |
Output is correct |
29 |
Correct |
781 ms |
200056 KB |
Output is correct |
30 |
Correct |
781 ms |
200056 KB |
Output is correct |
31 |
Correct |
788 ms |
200056 KB |
Output is correct |
32 |
Correct |
812 ms |
200056 KB |
Output is correct |
33 |
Correct |
674 ms |
200100 KB |
Output is correct |
34 |
Correct |
752 ms |
200056 KB |
Output is correct |
35 |
Correct |
723 ms |
200056 KB |
Output is correct |
36 |
Correct |
714 ms |
200056 KB |
Output is correct |
37 |
Correct |
738 ms |
199992 KB |
Output is correct |
38 |
Correct |
717 ms |
200056 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
680 ms |
200052 KB |
Output is correct |
2 |
Correct |
711 ms |
199972 KB |
Output is correct |
3 |
Correct |
785 ms |
199972 KB |
Output is correct |
4 |
Correct |
781 ms |
199972 KB |
Output is correct |
5 |
Correct |
787 ms |
199984 KB |
Output is correct |
6 |
Correct |
836 ms |
200056 KB |
Output is correct |
7 |
Correct |
829 ms |
199928 KB |
Output is correct |
8 |
Correct |
815 ms |
200056 KB |
Output is correct |
9 |
Correct |
826 ms |
200076 KB |
Output is correct |
10 |
Correct |
808 ms |
199976 KB |
Output is correct |
11 |
Correct |
782 ms |
199976 KB |
Output is correct |
12 |
Correct |
797 ms |
199976 KB |
Output is correct |
13 |
Correct |
789 ms |
199972 KB |
Output is correct |
14 |
Correct |
787 ms |
200056 KB |
Output is correct |
15 |
Correct |
791 ms |
200108 KB |
Output is correct |
16 |
Correct |
773 ms |
200064 KB |
Output is correct |
17 |
Correct |
788 ms |
200056 KB |
Output is correct |
18 |
Correct |
781 ms |
200056 KB |
Output is correct |
19 |
Correct |
783 ms |
200056 KB |
Output is correct |
20 |
Correct |
793 ms |
199928 KB |
Output is correct |
21 |
Correct |
771 ms |
199968 KB |
Output is correct |
22 |
Correct |
789 ms |
200056 KB |
Output is correct |
23 |
Correct |
784 ms |
200056 KB |
Output is correct |
24 |
Correct |
796 ms |
200184 KB |
Output is correct |
25 |
Correct |
798 ms |
199928 KB |
Output is correct |
26 |
Correct |
785 ms |
200028 KB |
Output is correct |
27 |
Correct |
780 ms |
199932 KB |
Output is correct |
28 |
Correct |
771 ms |
199980 KB |
Output is correct |
29 |
Correct |
781 ms |
200056 KB |
Output is correct |
30 |
Correct |
781 ms |
200056 KB |
Output is correct |
31 |
Correct |
788 ms |
200056 KB |
Output is correct |
32 |
Correct |
812 ms |
200056 KB |
Output is correct |
33 |
Correct |
674 ms |
200100 KB |
Output is correct |
34 |
Correct |
752 ms |
200056 KB |
Output is correct |
35 |
Correct |
723 ms |
200056 KB |
Output is correct |
36 |
Correct |
714 ms |
200056 KB |
Output is correct |
37 |
Correct |
738 ms |
199992 KB |
Output is correct |
38 |
Correct |
717 ms |
200056 KB |
Output is correct |
39 |
Correct |
836 ms |
208768 KB |
Output is correct |
40 |
Correct |
956 ms |
213952 KB |
Output is correct |
41 |
Correct |
818 ms |
206980 KB |
Output is correct |
42 |
Correct |
781 ms |
206428 KB |
Output is correct |
43 |
Correct |
889 ms |
204664 KB |
Output is correct |
44 |
Correct |
1085 ms |
216396 KB |
Output is correct |
45 |
Correct |
1033 ms |
216460 KB |
Output is correct |
46 |
Correct |
1065 ms |
216504 KB |
Output is correct |
47 |
Correct |
1048 ms |
216440 KB |
Output is correct |
48 |
Correct |
1122 ms |
216524 KB |
Output is correct |
49 |
Correct |
1054 ms |
216440 KB |
Output is correct |
50 |
Correct |
1127 ms |
216312 KB |
Output is correct |
51 |
Correct |
1142 ms |
216408 KB |
Output is correct |
52 |
Correct |
1084 ms |
216312 KB |
Output is correct |
53 |
Correct |
1102 ms |
216564 KB |
Output is correct |
54 |
Correct |
1192 ms |
216432 KB |
Output is correct |
55 |
Correct |
1270 ms |
216504 KB |
Output is correct |
56 |
Correct |
1266 ms |
216444 KB |
Output is correct |
57 |
Correct |
1255 ms |
216568 KB |
Output is correct |
58 |
Correct |
1136 ms |
216424 KB |
Output is correct |
59 |
Correct |
1234 ms |
216420 KB |
Output is correct |
60 |
Correct |
1249 ms |
216412 KB |
Output is correct |
61 |
Correct |
1184 ms |
216400 KB |
Output is correct |
62 |
Correct |
1193 ms |
216524 KB |
Output is correct |