#include <iostream>
#include <cstdio>
#include <algorithm>
#include <set>
using namespace std;
#define endl '\n'
#define pi pair<long long, int>
#define f first
#define s second
const int maxn = 500001;
int n;
long long a[maxn], dp[maxn];
set<pi> s;
int main(){
ios::sync_with_stdio(false);
cin.tie(NULL);
cin >> n;
s.insert({0, 0});
for(int i = 1; i <= n; i++){
cin >> a[i];
a[i] = -a[i] + a[i - 1];
pi p = *s.lower_bound({a[i], 0});
dp[i] = dp[p.s] + 1;
p = {2 * a[i] - a[p.s], i};
while((*s.begin()).f <= p.f) s.erase(s.begin());
s.insert(p);
}
cout << dp[n] << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
5 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
380 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
5 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
380 KB |
Output is correct |
16 |
Correct |
5 ms |
380 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
5 ms |
376 KB |
Output is correct |
19 |
Correct |
6 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
6 ms |
504 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
5 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
5 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
5 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
380 KB |
Output is correct |
16 |
Correct |
5 ms |
380 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
5 ms |
376 KB |
Output is correct |
19 |
Correct |
6 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
6 ms |
504 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
5 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
5 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
6 ms |
632 KB |
Output is correct |
32 |
Correct |
6 ms |
480 KB |
Output is correct |
33 |
Correct |
6 ms |
376 KB |
Output is correct |
34 |
Correct |
6 ms |
556 KB |
Output is correct |
35 |
Correct |
6 ms |
632 KB |
Output is correct |
36 |
Correct |
6 ms |
504 KB |
Output is correct |
37 |
Correct |
6 ms |
504 KB |
Output is correct |
38 |
Correct |
6 ms |
508 KB |
Output is correct |
39 |
Correct |
6 ms |
504 KB |
Output is correct |
40 |
Correct |
6 ms |
632 KB |
Output is correct |
41 |
Correct |
5 ms |
632 KB |
Output is correct |
42 |
Correct |
6 ms |
632 KB |
Output is correct |
43 |
Correct |
6 ms |
504 KB |
Output is correct |
44 |
Correct |
6 ms |
636 KB |
Output is correct |
45 |
Correct |
6 ms |
636 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
5 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
380 KB |
Output is correct |
16 |
Correct |
5 ms |
380 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
5 ms |
376 KB |
Output is correct |
19 |
Correct |
6 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
6 ms |
504 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
5 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
5 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
6 ms |
632 KB |
Output is correct |
32 |
Correct |
6 ms |
480 KB |
Output is correct |
33 |
Correct |
6 ms |
376 KB |
Output is correct |
34 |
Correct |
6 ms |
556 KB |
Output is correct |
35 |
Correct |
6 ms |
632 KB |
Output is correct |
36 |
Correct |
6 ms |
504 KB |
Output is correct |
37 |
Correct |
6 ms |
504 KB |
Output is correct |
38 |
Correct |
6 ms |
508 KB |
Output is correct |
39 |
Correct |
6 ms |
504 KB |
Output is correct |
40 |
Correct |
6 ms |
632 KB |
Output is correct |
41 |
Correct |
5 ms |
632 KB |
Output is correct |
42 |
Correct |
6 ms |
632 KB |
Output is correct |
43 |
Correct |
6 ms |
504 KB |
Output is correct |
44 |
Correct |
6 ms |
636 KB |
Output is correct |
45 |
Correct |
6 ms |
636 KB |
Output is correct |
46 |
Correct |
39 ms |
8568 KB |
Output is correct |
47 |
Correct |
45 ms |
6648 KB |
Output is correct |
48 |
Correct |
40 ms |
3192 KB |
Output is correct |
49 |
Correct |
50 ms |
6264 KB |
Output is correct |
50 |
Correct |
59 ms |
9080 KB |
Output is correct |
51 |
Correct |
56 ms |
7800 KB |
Output is correct |
52 |
Correct |
29 ms |
4088 KB |
Output is correct |
53 |
Correct |
18 ms |
2552 KB |
Output is correct |
54 |
Correct |
45 ms |
6648 KB |
Output is correct |
55 |
Correct |
55 ms |
8440 KB |
Output is correct |
56 |
Correct |
53 ms |
8696 KB |
Output is correct |
57 |
Correct |
49 ms |
8056 KB |
Output is correct |
58 |
Correct |
49 ms |
8056 KB |
Output is correct |
59 |
Correct |
56 ms |
8696 KB |
Output is correct |
60 |
Correct |
54 ms |
8696 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
5 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
376 KB |
Output is correct |
15 |
Correct |
5 ms |
380 KB |
Output is correct |
16 |
Correct |
5 ms |
380 KB |
Output is correct |
17 |
Correct |
5 ms |
376 KB |
Output is correct |
18 |
Correct |
5 ms |
376 KB |
Output is correct |
19 |
Correct |
6 ms |
376 KB |
Output is correct |
20 |
Correct |
5 ms |
376 KB |
Output is correct |
21 |
Correct |
5 ms |
376 KB |
Output is correct |
22 |
Correct |
6 ms |
504 KB |
Output is correct |
23 |
Correct |
5 ms |
376 KB |
Output is correct |
24 |
Correct |
5 ms |
376 KB |
Output is correct |
25 |
Correct |
5 ms |
376 KB |
Output is correct |
26 |
Correct |
5 ms |
376 KB |
Output is correct |
27 |
Correct |
5 ms |
376 KB |
Output is correct |
28 |
Correct |
5 ms |
376 KB |
Output is correct |
29 |
Correct |
5 ms |
376 KB |
Output is correct |
30 |
Correct |
5 ms |
376 KB |
Output is correct |
31 |
Correct |
6 ms |
632 KB |
Output is correct |
32 |
Correct |
6 ms |
480 KB |
Output is correct |
33 |
Correct |
6 ms |
376 KB |
Output is correct |
34 |
Correct |
6 ms |
556 KB |
Output is correct |
35 |
Correct |
6 ms |
632 KB |
Output is correct |
36 |
Correct |
6 ms |
504 KB |
Output is correct |
37 |
Correct |
6 ms |
504 KB |
Output is correct |
38 |
Correct |
6 ms |
508 KB |
Output is correct |
39 |
Correct |
6 ms |
504 KB |
Output is correct |
40 |
Correct |
6 ms |
632 KB |
Output is correct |
41 |
Correct |
5 ms |
632 KB |
Output is correct |
42 |
Correct |
6 ms |
632 KB |
Output is correct |
43 |
Correct |
6 ms |
504 KB |
Output is correct |
44 |
Correct |
6 ms |
636 KB |
Output is correct |
45 |
Correct |
6 ms |
636 KB |
Output is correct |
46 |
Correct |
39 ms |
8568 KB |
Output is correct |
47 |
Correct |
45 ms |
6648 KB |
Output is correct |
48 |
Correct |
40 ms |
3192 KB |
Output is correct |
49 |
Correct |
50 ms |
6264 KB |
Output is correct |
50 |
Correct |
59 ms |
9080 KB |
Output is correct |
51 |
Correct |
56 ms |
7800 KB |
Output is correct |
52 |
Correct |
29 ms |
4088 KB |
Output is correct |
53 |
Correct |
18 ms |
2552 KB |
Output is correct |
54 |
Correct |
45 ms |
6648 KB |
Output is correct |
55 |
Correct |
55 ms |
8440 KB |
Output is correct |
56 |
Correct |
53 ms |
8696 KB |
Output is correct |
57 |
Correct |
49 ms |
8056 KB |
Output is correct |
58 |
Correct |
49 ms |
8056 KB |
Output is correct |
59 |
Correct |
56 ms |
8696 KB |
Output is correct |
60 |
Correct |
54 ms |
8696 KB |
Output is correct |
61 |
Correct |
196 ms |
40312 KB |
Output is correct |
62 |
Correct |
205 ms |
40440 KB |
Output is correct |
63 |
Correct |
233 ms |
31864 KB |
Output is correct |
64 |
Correct |
256 ms |
15352 KB |
Output is correct |
65 |
Correct |
308 ms |
40312 KB |
Output is correct |
66 |
Correct |
275 ms |
33916 KB |
Output is correct |
67 |
Correct |
220 ms |
27384 KB |
Output is correct |
68 |
Correct |
108 ms |
14328 KB |
Output is correct |
69 |
Correct |
231 ms |
31864 KB |
Output is correct |
70 |
Correct |
281 ms |
37880 KB |
Output is correct |
71 |
Correct |
261 ms |
40312 KB |
Output is correct |
72 |
Correct |
249 ms |
34040 KB |
Output is correct |
73 |
Correct |
263 ms |
35708 KB |
Output is correct |
74 |
Correct |
302 ms |
40312 KB |
Output is correct |
75 |
Correct |
282 ms |
40312 KB |
Output is correct |