#include "mountains.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int D[2005][2005];
// if j > i D[j][i] == 0
bool able(int i, int j, int k, vector<int> &y){
ll ax = i, bx = j, cx = k;
ll ay = y[i], by = y[j], cy = y[k];
ll ret = ax*by + bx*cy + cx*ay;
ret -= bx*ay + cx*by + ax*cy;
return ret >= 0;
}
int maximum_deevs(vector<int> y){
int n = (int) y.size();
y.insert(y.begin(), 0);
for (int i=1; i<=n; i++){
//i is the last deev
D[i][i] = D[i-1][i] = 1;
int l = i-1;
int inside = 0;
for (int j=i-2; j>=1; j--){
if (able(j, l, i, y)){ // j is visible
inside += D[j+1][l-1];
l = j;
}
D[j][i] = max(D[j][i-1], D[j][l-1]+inside+1);
}
}
return D[1][n];
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
9 ms |
376 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
9 ms |
376 KB |
Output is correct |
| 17 |
Correct |
3 ms |
504 KB |
Output is correct |
| 18 |
Correct |
3 ms |
504 KB |
Output is correct |
| 19 |
Correct |
2 ms |
504 KB |
Output is correct |
| 20 |
Correct |
2 ms |
504 KB |
Output is correct |
| 21 |
Correct |
2 ms |
504 KB |
Output is correct |
| 22 |
Correct |
2 ms |
504 KB |
Output is correct |
| 23 |
Correct |
2 ms |
504 KB |
Output is correct |
| 24 |
Correct |
2 ms |
504 KB |
Output is correct |
| 25 |
Correct |
2 ms |
504 KB |
Output is correct |
| 26 |
Correct |
2 ms |
476 KB |
Output is correct |
| 27 |
Correct |
2 ms |
504 KB |
Output is correct |
| 28 |
Correct |
2 ms |
504 KB |
Output is correct |
| 29 |
Correct |
2 ms |
508 KB |
Output is correct |
| 30 |
Correct |
3 ms |
504 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
2 ms |
504 KB |
Output is correct |
| 33 |
Correct |
2 ms |
504 KB |
Output is correct |
| 34 |
Correct |
2 ms |
504 KB |
Output is correct |
| 35 |
Correct |
2 ms |
504 KB |
Output is correct |
| 36 |
Correct |
2 ms |
504 KB |
Output is correct |
| 37 |
Correct |
2 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
504 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
9 ms |
376 KB |
Output is correct |
| 17 |
Correct |
3 ms |
504 KB |
Output is correct |
| 18 |
Correct |
3 ms |
504 KB |
Output is correct |
| 19 |
Correct |
2 ms |
504 KB |
Output is correct |
| 20 |
Correct |
2 ms |
504 KB |
Output is correct |
| 21 |
Correct |
2 ms |
504 KB |
Output is correct |
| 22 |
Correct |
2 ms |
504 KB |
Output is correct |
| 23 |
Correct |
2 ms |
504 KB |
Output is correct |
| 24 |
Correct |
2 ms |
504 KB |
Output is correct |
| 25 |
Correct |
2 ms |
504 KB |
Output is correct |
| 26 |
Correct |
2 ms |
476 KB |
Output is correct |
| 27 |
Correct |
2 ms |
504 KB |
Output is correct |
| 28 |
Correct |
2 ms |
504 KB |
Output is correct |
| 29 |
Correct |
2 ms |
508 KB |
Output is correct |
| 30 |
Correct |
3 ms |
504 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
2 ms |
504 KB |
Output is correct |
| 33 |
Correct |
2 ms |
504 KB |
Output is correct |
| 34 |
Correct |
2 ms |
504 KB |
Output is correct |
| 35 |
Correct |
2 ms |
504 KB |
Output is correct |
| 36 |
Correct |
2 ms |
504 KB |
Output is correct |
| 37 |
Correct |
2 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
504 KB |
Output is correct |
| 39 |
Correct |
3 ms |
1400 KB |
Output is correct |
| 40 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 41 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 42 |
Correct |
5 ms |
1656 KB |
Output is correct |
| 43 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 44 |
Correct |
3 ms |
1660 KB |
Output is correct |
| 45 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 46 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 47 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 48 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 49 |
Correct |
3 ms |
1628 KB |
Output is correct |
| 50 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 51 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 52 |
Correct |
3 ms |
1784 KB |
Output is correct |
| 53 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 54 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 55 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 56 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 57 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 58 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 59 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 60 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 61 |
Correct |
3 ms |
1656 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
504 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
2 ms |
376 KB |
Output is correct |
| 4 |
Correct |
2 ms |
376 KB |
Output is correct |
| 5 |
Correct |
2 ms |
376 KB |
Output is correct |
| 6 |
Correct |
2 ms |
376 KB |
Output is correct |
| 7 |
Correct |
2 ms |
376 KB |
Output is correct |
| 8 |
Correct |
2 ms |
376 KB |
Output is correct |
| 9 |
Correct |
2 ms |
376 KB |
Output is correct |
| 10 |
Correct |
2 ms |
376 KB |
Output is correct |
| 11 |
Correct |
2 ms |
376 KB |
Output is correct |
| 12 |
Correct |
2 ms |
376 KB |
Output is correct |
| 13 |
Correct |
2 ms |
376 KB |
Output is correct |
| 14 |
Correct |
2 ms |
376 KB |
Output is correct |
| 15 |
Correct |
2 ms |
376 KB |
Output is correct |
| 16 |
Correct |
9 ms |
376 KB |
Output is correct |
| 17 |
Correct |
3 ms |
504 KB |
Output is correct |
| 18 |
Correct |
3 ms |
504 KB |
Output is correct |
| 19 |
Correct |
2 ms |
504 KB |
Output is correct |
| 20 |
Correct |
2 ms |
504 KB |
Output is correct |
| 21 |
Correct |
2 ms |
504 KB |
Output is correct |
| 22 |
Correct |
2 ms |
504 KB |
Output is correct |
| 23 |
Correct |
2 ms |
504 KB |
Output is correct |
| 24 |
Correct |
2 ms |
504 KB |
Output is correct |
| 25 |
Correct |
2 ms |
504 KB |
Output is correct |
| 26 |
Correct |
2 ms |
476 KB |
Output is correct |
| 27 |
Correct |
2 ms |
504 KB |
Output is correct |
| 28 |
Correct |
2 ms |
504 KB |
Output is correct |
| 29 |
Correct |
2 ms |
508 KB |
Output is correct |
| 30 |
Correct |
3 ms |
504 KB |
Output is correct |
| 31 |
Correct |
2 ms |
504 KB |
Output is correct |
| 32 |
Correct |
2 ms |
504 KB |
Output is correct |
| 33 |
Correct |
2 ms |
504 KB |
Output is correct |
| 34 |
Correct |
2 ms |
504 KB |
Output is correct |
| 35 |
Correct |
2 ms |
504 KB |
Output is correct |
| 36 |
Correct |
2 ms |
504 KB |
Output is correct |
| 37 |
Correct |
2 ms |
504 KB |
Output is correct |
| 38 |
Correct |
3 ms |
504 KB |
Output is correct |
| 39 |
Correct |
3 ms |
1400 KB |
Output is correct |
| 40 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 41 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 42 |
Correct |
5 ms |
1656 KB |
Output is correct |
| 43 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 44 |
Correct |
3 ms |
1660 KB |
Output is correct |
| 45 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 46 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 47 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 48 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 49 |
Correct |
3 ms |
1628 KB |
Output is correct |
| 50 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 51 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 52 |
Correct |
3 ms |
1784 KB |
Output is correct |
| 53 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 54 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 55 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 56 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 57 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 58 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 59 |
Correct |
4 ms |
1656 KB |
Output is correct |
| 60 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 61 |
Correct |
3 ms |
1656 KB |
Output is correct |
| 62 |
Correct |
10 ms |
6392 KB |
Output is correct |
| 63 |
Correct |
32 ms |
14172 KB |
Output is correct |
| 64 |
Correct |
32 ms |
14204 KB |
Output is correct |
| 65 |
Correct |
32 ms |
14200 KB |
Output is correct |
| 66 |
Correct |
31 ms |
14200 KB |
Output is correct |
| 67 |
Correct |
32 ms |
14124 KB |
Output is correct |
| 68 |
Correct |
31 ms |
14200 KB |
Output is correct |
| 69 |
Correct |
32 ms |
14200 KB |
Output is correct |
| 70 |
Correct |
39 ms |
14172 KB |
Output is correct |
| 71 |
Correct |
36 ms |
14200 KB |
Output is correct |
| 72 |
Correct |
37 ms |
14200 KB |
Output is correct |
| 73 |
Correct |
37 ms |
14200 KB |
Output is correct |
| 74 |
Correct |
37 ms |
14200 KB |
Output is correct |
| 75 |
Correct |
36 ms |
14200 KB |
Output is correct |
| 76 |
Correct |
32 ms |
14200 KB |
Output is correct |
| 77 |
Correct |
44 ms |
14200 KB |
Output is correct |
| 78 |
Correct |
43 ms |
14200 KB |
Output is correct |
| 79 |
Correct |
46 ms |
14200 KB |
Output is correct |
| 80 |
Correct |
48 ms |
14112 KB |
Output is correct |
| 81 |
Correct |
44 ms |
14172 KB |
Output is correct |
| 82 |
Correct |
30 ms |
14200 KB |
Output is correct |
| 83 |
Correct |
32 ms |
14200 KB |
Output is correct |
| 84 |
Correct |
34 ms |
14192 KB |
Output is correct |
| 85 |
Correct |
37 ms |
14200 KB |
Output is correct |
| 86 |
Correct |
37 ms |
14200 KB |
Output is correct |
