#include <bits/stdc++.h>
using namespace std;
const int maxn = 3e5 + 5;
struct SGT {
vector<int> tr;
vector<multiset<int>> arr;
SGT(int sz) : tr(sz << 2), arr(sz + 1) {}
void pull(int x) {
tr[x] = max(tr[x << 1], tr[(x << 1) | 1]);
}
void add(int x, int L, int R, int pos, int val) {
if(L == R) {
arr[L].insert(val);
tr[x] = *arr[L].rbegin();
return;
}
int mid = (L + R) >> 1;
if(pos <= mid) add(x << 1, L, mid, pos, val);
else add((x << 1) | 1, mid + 1, R, pos, val);
pull(x);
}
void kill(int x, int L, int R, int pos, int val) {
if(L == R) {
arr[L].erase(arr[L].find(val));
if(!arr[L].empty()) tr[x] = *arr[L].rbegin();
else tr[x] = 0;
return;
}
int mid = (L + R) >> 1;
if(pos <= mid) kill(x << 1, L, mid, pos, val);
else kill((x << 1) | 1, mid + 1, R, pos, val);
pull(x);
}
int ask(int x, int L, int R, int l, int r) {
if(l > r) return 0;
if(l <= L && R <= r) {
return tr[x];
}
int ret = 0, mid = (L + R) >> 1;
if(l <= mid) ret = max(ret, ask(x << 1, L, mid, l, r));
if(r > mid) ret = max(ret, ask((x << 1) | 1, mid + 1, R, l, r));
return ret;
}
};
vector<int> V;
int A[maxn];
int n, D;
void getr(vector<int> &r) {
set<int> st;
vector<pair<int, int>> arr;
vector<int> op(n + 1), ed(n + 1);
for(int i = 1; i <= n; ++i) {
arr.emplace_back(A[i], -i);
}
sort(begin(arr), end(arr));
for(int i = 0; i < n; ++i) {
int pos = -arr[i].second;
op[pos] = ed[pos] = pos;
auto it = st.upper_bound(pos);
if(it != st.end() && op[*it] < pos) {
r[pos] = *it + D;
continue;
}
it = st.insert(pos).first;
// printf("insert %d\n", pos);
auto xx = next(it);
r[pos] = pos + D;
if(xx != st.end()) {
if(*xx - pos <= D) {
int ll = op[pos];
int rr = ed[*xx];
// printf("merge (%d, %d), (%d, %d)\n", op[pos], ed[pos], op[*xx], ed[*xx]);
ed[ll] = rr;
op[rr] = ll;
r[pos] = rr + D;
if(pos != ll) st.erase(pos);
if(*xx != rr) st.erase(*xx);
}
}
if(it != st.begin()) {
xx = prev(it);
if(pos - *xx <= D) {
int ll = op[*xx];
int rr = ed[pos];
// printf("merge (%d, %d), (%d, %d)\n", op[pos], ed[pos], op[*xx], ed[*xx]);
ed[ll] = rr;
op[rr] = ll;
if(pos != rr) st.erase(pos);
if(*xx != ll) st.erase(*xx);
}
}
}
}
void solve() {
vector<int> dp(n + 1), r(n + 1);
// for(int i = 1; i <= n; ++i) {
// int lst = i;
// for(int j = i; j <= n; ++j) {
// if(j - lst > D) break;
// if(A[j] <= A[i]) lst = j;
// }
// r[i] = lst + D;
// }
// for(int i = 1; i <= n; ++i) printf("%d%c", r[i], " \n"[i == n]);
getr(r);
// for(int i = 1; i <= n; ++i) printf("%d%c", r[i], " \n"[i == n]);
// O(n^2) dp
SGT loli(n);
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int, int>>> pq;
for(int i = 1; i <= n; ++i) {
// printf("here at %d\n", i);
while(pq.size() && pq.top().first < i) {
int pos = pq.top().second;
loli.kill(1, 1, n, A[pos], dp[pos]);
pq.pop();
}
// printf("ask %d %d\n", 1, A[i] - 1);
dp[i] = loli.ask(1, 1, n, 1, A[i] - 1) + 1;
// printf("dp[%d] = %d\n", i, dp[i]);
loli.add(1, 1, n, A[i], dp[i]);
pq.emplace(r[i], i);
// for(int j = 1; j < i; ++j) {
// if(r[j] >= i && A[j] < A[i])
// dp[i] = max(dp[i], dp[j] + 1);
// }
}
cout << *max_element(begin(dp), end(dp)) << '\n';
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> D;
for(int i = 1; i <= n; ++i) {
cin >> A[i]; V.push_back(A[i]);
}
sort(begin(V), end(V));
for(int i = 1; i <= n; ++i) {
A[i] = lower_bound(begin(V), end(V), A[i]) - begin(V) + 1;
}
solve();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 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 |
344 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 |
424 KB |
Output is correct |
11 |
Correct |
0 ms |
344 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 |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
0 ms |
344 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 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 |
344 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 |
424 KB |
Output is correct |
11 |
Correct |
0 ms |
344 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 |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
0 ms |
344 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
1 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
1 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 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 |
344 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 |
424 KB |
Output is correct |
11 |
Correct |
0 ms |
344 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 |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
0 ms |
344 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
1 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
1 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
7 ms |
1116 KB |
Output is correct |
42 |
Correct |
6 ms |
1116 KB |
Output is correct |
43 |
Correct |
4 ms |
1116 KB |
Output is correct |
44 |
Correct |
4 ms |
1116 KB |
Output is correct |
45 |
Correct |
4 ms |
1336 KB |
Output is correct |
46 |
Correct |
4 ms |
1324 KB |
Output is correct |
47 |
Correct |
6 ms |
860 KB |
Output is correct |
48 |
Correct |
5 ms |
1116 KB |
Output is correct |
49 |
Correct |
5 ms |
1112 KB |
Output is correct |
50 |
Correct |
5 ms |
1072 KB |
Output is correct |
51 |
Correct |
5 ms |
860 KB |
Output is correct |
52 |
Correct |
6 ms |
1012 KB |
Output is correct |
53 |
Correct |
4 ms |
816 KB |
Output is correct |
54 |
Correct |
4 ms |
816 KB |
Output is correct |
55 |
Correct |
5 ms |
1328 KB |
Output is correct |
56 |
Correct |
4 ms |
1328 KB |
Output is correct |
57 |
Correct |
4 ms |
1272 KB |
Output is correct |
58 |
Correct |
3 ms |
1328 KB |
Output is correct |
59 |
Correct |
3 ms |
1324 KB |
Output is correct |
60 |
Correct |
3 ms |
1332 KB |
Output is correct |
61 |
Correct |
3 ms |
1332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
136 ms |
41784 KB |
Output is correct |
2 |
Correct |
234 ms |
29172 KB |
Output is correct |
3 |
Correct |
307 ms |
29352 KB |
Output is correct |
4 |
Correct |
422 ms |
29372 KB |
Output is correct |
5 |
Correct |
308 ms |
27376 KB |
Output is correct |
6 |
Correct |
398 ms |
29252 KB |
Output is correct |
7 |
Correct |
149 ms |
23708 KB |
Output is correct |
8 |
Correct |
129 ms |
41708 KB |
Output is correct |
9 |
Correct |
177 ms |
23956 KB |
Output is correct |
10 |
Correct |
176 ms |
32036 KB |
Output is correct |
11 |
Correct |
318 ms |
24420 KB |
Output is correct |
12 |
Correct |
339 ms |
24560 KB |
Output is correct |
13 |
Correct |
256 ms |
23824 KB |
Output is correct |
14 |
Correct |
336 ms |
24216 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
128 ms |
42152 KB |
Output is correct |
2 |
Correct |
219 ms |
41704 KB |
Output is correct |
3 |
Correct |
268 ms |
40572 KB |
Output is correct |
4 |
Correct |
240 ms |
41148 KB |
Output is correct |
5 |
Correct |
211 ms |
41800 KB |
Output is correct |
6 |
Correct |
255 ms |
41404 KB |
Output is correct |
7 |
Correct |
128 ms |
41624 KB |
Output is correct |
8 |
Correct |
133 ms |
40532 KB |
Output is correct |
9 |
Correct |
134 ms |
41360 KB |
Output is correct |
10 |
Correct |
198 ms |
42084 KB |
Output is correct |
11 |
Correct |
255 ms |
40904 KB |
Output is correct |
12 |
Correct |
202 ms |
42228 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 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 |
344 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 |
424 KB |
Output is correct |
11 |
Correct |
0 ms |
344 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 |
1 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
344 KB |
Output is correct |
17 |
Correct |
0 ms |
344 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
348 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
1 ms |
348 KB |
Output is correct |
28 |
Correct |
1 ms |
348 KB |
Output is correct |
29 |
Correct |
1 ms |
344 KB |
Output is correct |
30 |
Correct |
1 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
348 KB |
Output is correct |
32 |
Correct |
0 ms |
348 KB |
Output is correct |
33 |
Correct |
1 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
348 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
1 ms |
348 KB |
Output is correct |
39 |
Correct |
1 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
7 ms |
1116 KB |
Output is correct |
42 |
Correct |
6 ms |
1116 KB |
Output is correct |
43 |
Correct |
4 ms |
1116 KB |
Output is correct |
44 |
Correct |
4 ms |
1116 KB |
Output is correct |
45 |
Correct |
4 ms |
1336 KB |
Output is correct |
46 |
Correct |
4 ms |
1324 KB |
Output is correct |
47 |
Correct |
6 ms |
860 KB |
Output is correct |
48 |
Correct |
5 ms |
1116 KB |
Output is correct |
49 |
Correct |
5 ms |
1112 KB |
Output is correct |
50 |
Correct |
5 ms |
1072 KB |
Output is correct |
51 |
Correct |
5 ms |
860 KB |
Output is correct |
52 |
Correct |
6 ms |
1012 KB |
Output is correct |
53 |
Correct |
4 ms |
816 KB |
Output is correct |
54 |
Correct |
4 ms |
816 KB |
Output is correct |
55 |
Correct |
5 ms |
1328 KB |
Output is correct |
56 |
Correct |
4 ms |
1328 KB |
Output is correct |
57 |
Correct |
4 ms |
1272 KB |
Output is correct |
58 |
Correct |
3 ms |
1328 KB |
Output is correct |
59 |
Correct |
3 ms |
1324 KB |
Output is correct |
60 |
Correct |
3 ms |
1332 KB |
Output is correct |
61 |
Correct |
3 ms |
1332 KB |
Output is correct |
62 |
Correct |
136 ms |
41784 KB |
Output is correct |
63 |
Correct |
234 ms |
29172 KB |
Output is correct |
64 |
Correct |
307 ms |
29352 KB |
Output is correct |
65 |
Correct |
422 ms |
29372 KB |
Output is correct |
66 |
Correct |
308 ms |
27376 KB |
Output is correct |
67 |
Correct |
398 ms |
29252 KB |
Output is correct |
68 |
Correct |
149 ms |
23708 KB |
Output is correct |
69 |
Correct |
129 ms |
41708 KB |
Output is correct |
70 |
Correct |
177 ms |
23956 KB |
Output is correct |
71 |
Correct |
176 ms |
32036 KB |
Output is correct |
72 |
Correct |
318 ms |
24420 KB |
Output is correct |
73 |
Correct |
339 ms |
24560 KB |
Output is correct |
74 |
Correct |
256 ms |
23824 KB |
Output is correct |
75 |
Correct |
336 ms |
24216 KB |
Output is correct |
76 |
Correct |
128 ms |
42152 KB |
Output is correct |
77 |
Correct |
219 ms |
41704 KB |
Output is correct |
78 |
Correct |
268 ms |
40572 KB |
Output is correct |
79 |
Correct |
240 ms |
41148 KB |
Output is correct |
80 |
Correct |
211 ms |
41800 KB |
Output is correct |
81 |
Correct |
255 ms |
41404 KB |
Output is correct |
82 |
Correct |
128 ms |
41624 KB |
Output is correct |
83 |
Correct |
133 ms |
40532 KB |
Output is correct |
84 |
Correct |
134 ms |
41360 KB |
Output is correct |
85 |
Correct |
198 ms |
42084 KB |
Output is correct |
86 |
Correct |
255 ms |
40904 KB |
Output is correct |
87 |
Correct |
202 ms |
42228 KB |
Output is correct |
88 |
Correct |
362 ms |
27260 KB |
Output is correct |
89 |
Correct |
363 ms |
26216 KB |
Output is correct |
90 |
Correct |
309 ms |
28260 KB |
Output is correct |
91 |
Correct |
255 ms |
42076 KB |
Output is correct |
92 |
Correct |
236 ms |
41388 KB |
Output is correct |
93 |
Correct |
279 ms |
41196 KB |
Output is correct |
94 |
Correct |
261 ms |
41840 KB |
Output is correct |
95 |
Correct |
323 ms |
26404 KB |
Output is correct |
96 |
Correct |
305 ms |
26636 KB |
Output is correct |
97 |
Correct |
327 ms |
29524 KB |
Output is correct |
98 |
Correct |
261 ms |
41136 KB |
Output is correct |
99 |
Correct |
249 ms |
41864 KB |
Output is correct |
100 |
Correct |
251 ms |
41976 KB |
Output is correct |
101 |
Correct |
167 ms |
24040 KB |
Output is correct |
102 |
Correct |
179 ms |
24068 KB |
Output is correct |
103 |
Correct |
203 ms |
23888 KB |
Output is correct |
104 |
Correct |
231 ms |
24372 KB |
Output is correct |
105 |
Correct |
256 ms |
28944 KB |
Output is correct |
106 |
Correct |
190 ms |
42256 KB |
Output is correct |
107 |
Correct |
195 ms |
41220 KB |
Output is correct |
108 |
Correct |
222 ms |
41824 KB |
Output is correct |
109 |
Correct |
234 ms |
23884 KB |
Output is correct |
110 |
Correct |
271 ms |
34572 KB |
Output is correct |
111 |
Correct |
266 ms |
37864 KB |
Output is correct |
112 |
Correct |
214 ms |
37760 KB |
Output is correct |
113 |
Correct |
231 ms |
42168 KB |
Output is correct |
114 |
Correct |
228 ms |
42168 KB |
Output is correct |
115 |
Correct |
123 ms |
41904 KB |
Output is correct |
116 |
Correct |
118 ms |
41564 KB |
Output is correct |
117 |
Correct |
194 ms |
41952 KB |
Output is correct |
118 |
Correct |
168 ms |
41652 KB |
Output is correct |
119 |
Correct |
192 ms |
41540 KB |
Output is correct |
120 |
Correct |
217 ms |
41040 KB |
Output is correct |