#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
using namespace std;
struct SegTree {
int n;
vector<int> tree;
SegTree(int _n) {
n = _n;
tree.resize(4*n+5);
}
void update(int u, int tl, int tr, int pos, int val) {
if(tl == tr) {
tree[u] = max(tree[u], val);
} else {
int tm = (tl + tr) / 2;
if(pos <= tm)
update(2*u, tl, tm, pos, val);
else
update(2*u+1, tm+1, tr, pos, val);
tree[u] = max(tree[2*u], tree[2*u+1]);
}
}
int query(int u, int tl, int tr, int l, int r) {
if(tl > tr || l > tr || tl > r) return 0;
if(l <= tl && tr <= r) return tree[u];
int tm = (tl + tr) / 2;
return max(
query(2*u, tl, tm, l, r),
query(2*u+1, tm+1, tr, l, r)
);
}
void update(int p, int v) { update(1, 0, n-1, p, v); }
int query(int l, int r) { return query(1, 0, n-1, l, r); }
void reset() { for(int i=0; i<tree.size(); i++) tree[i] = 0; }
};
int32_t main() {
int n, X, ans = 0;
cin >> n >> X;
set<int> s;
vector<int> v(n+1);
for(int i=1; i<=n; i++) {
cin >> v[i];
s.insert(v[i]); s.insert(v[i] - X);
}
vector<int> comp(all(s));
SegTree tree(2*n+5);
vector<int> L(n+1);
for(int i=1; i<=n; i++) {
int p = lower_bound(all(comp), v[i]) - comp.begin();
L[i] = tree.query(0, p-1) + 1;
tree.update(p, L[i]);
}
tree.reset();
for(int i=n; i>=1; i--) {
int p = lower_bound(all(comp), v[i] - X) - comp.begin();
int lis = tree.query(p+1, 2*n-1) + 1;
ans = max(ans, L[i] + lis - 1);
p = lower_bound(all(comp), v[i]) - comp.begin();
tree.update(p, tree.query(p+1, 2*n-1) + 1);
}
cout << ans << '\n';
return 0;
}
Compilation message
glo.cpp: In member function 'void SegTree::reset()':
glo.cpp:39:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
39 | void reset() { for(int i=0; i<tree.size(); i++) tree[i] = 0; }
| ~^~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
2 ms |
348 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
2 ms |
348 KB |
Output is correct |
23 |
Correct |
1 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
348 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
375 ms |
18604 KB |
Output is correct |
2 |
Correct |
398 ms |
18440 KB |
Output is correct |
3 |
Correct |
407 ms |
18432 KB |
Output is correct |
4 |
Correct |
374 ms |
18256 KB |
Output is correct |
5 |
Correct |
204 ms |
13344 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
86 ms |
7468 KB |
Output is correct |
2 |
Correct |
90 ms |
7468 KB |
Output is correct |
3 |
Correct |
86 ms |
7256 KB |
Output is correct |
4 |
Correct |
54 ms |
4696 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
55 ms |
4928 KB |
Output is correct |
7 |
Correct |
78 ms |
6620 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
205 ms |
14420 KB |
Output is correct |
2 |
Correct |
218 ms |
14516 KB |
Output is correct |
3 |
Correct |
485 ms |
28496 KB |
Output is correct |
4 |
Correct |
233 ms |
18196 KB |
Output is correct |
5 |
Correct |
141 ms |
14420 KB |
Output is correct |
6 |
Correct |
305 ms |
27220 KB |
Output is correct |
7 |
Correct |
321 ms |
26960 KB |
Output is correct |
8 |
Correct |
171 ms |
14444 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
2 ms |
348 KB |
Output is correct |
20 |
Correct |
1 ms |
348 KB |
Output is correct |
21 |
Correct |
1 ms |
348 KB |
Output is correct |
22 |
Correct |
2 ms |
348 KB |
Output is correct |
23 |
Correct |
1 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
348 KB |
Output is correct |
25 |
Correct |
1 ms |
348 KB |
Output is correct |
26 |
Correct |
1 ms |
348 KB |
Output is correct |
27 |
Correct |
375 ms |
18604 KB |
Output is correct |
28 |
Correct |
398 ms |
18440 KB |
Output is correct |
29 |
Correct |
407 ms |
18432 KB |
Output is correct |
30 |
Correct |
374 ms |
18256 KB |
Output is correct |
31 |
Correct |
204 ms |
13344 KB |
Output is correct |
32 |
Correct |
86 ms |
7468 KB |
Output is correct |
33 |
Correct |
90 ms |
7468 KB |
Output is correct |
34 |
Correct |
86 ms |
7256 KB |
Output is correct |
35 |
Correct |
54 ms |
4696 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
55 ms |
4928 KB |
Output is correct |
38 |
Correct |
78 ms |
6620 KB |
Output is correct |
39 |
Correct |
205 ms |
14420 KB |
Output is correct |
40 |
Correct |
218 ms |
14516 KB |
Output is correct |
41 |
Correct |
485 ms |
28496 KB |
Output is correct |
42 |
Correct |
233 ms |
18196 KB |
Output is correct |
43 |
Correct |
141 ms |
14420 KB |
Output is correct |
44 |
Correct |
305 ms |
27220 KB |
Output is correct |
45 |
Correct |
321 ms |
26960 KB |
Output is correct |
46 |
Correct |
171 ms |
14444 KB |
Output is correct |
47 |
Correct |
199 ms |
14420 KB |
Output is correct |
48 |
Correct |
200 ms |
14416 KB |
Output is correct |
49 |
Correct |
473 ms |
28500 KB |
Output is correct |
50 |
Correct |
215 ms |
18256 KB |
Output is correct |
51 |
Correct |
181 ms |
13812 KB |
Output is correct |
52 |
Correct |
276 ms |
18480 KB |
Output is correct |
53 |
Correct |
313 ms |
28500 KB |
Output is correct |
54 |
Correct |
325 ms |
28540 KB |
Output is correct |
55 |
Correct |
344 ms |
25256 KB |
Output is correct |