#include "sequence.h"
#include <bits/stdc++.h>
using namespace std;
typedef int ll;
const ll INF = 1'000'000'000;
struct segment_tree_min {
vector<ll> tree, m;
ll size;
segment_tree_min(ll n) {
size = n;
tree.resize(size * 4, 0);
m.resize(size * 4, 0);
}
ll get(ll l, ll r) {
return get(1, 0, size, l, r);
}
ll get(ll v, ll l, ll r, ll ql, ll qr) {
if (ql <= l && r <= qr) {
return tree[v];
}
if (qr <= l || r <= ql) {
return INF;
}
ll mid = (l + r) / 2;
return min(get(v * 2, l, mid, ql, qr), get(v * 2 + 1, mid, r, ql, qr)) + m[v];
}
void add(ll l, ll r, ll x) {
add(1, 0, size, l, r, x);
}
void add(ll v, ll l, ll r, ll ql, ll qr, ll x) {
if (ql <= l && r <= qr) {
tree[v] += x;
m[v] += x;
return;
}
if (qr <= l || r <= ql) {
return;
}
ll mid = (l + r) / 2;
add(v * 2, l, mid, ql, qr, x);
add(v * 2 + 1, mid, r, ql, qr, x);
tree[v] = min(tree[v * 2], tree[v * 2 + 1]) + m[v];
}
};
struct segment_tree_max {
vector<ll> tree, m;
ll size;
segment_tree_max(ll n) {
size = n;
tree.resize(size * 4, 0);
m.resize(size * 4, 0);
}
ll get(ll l, ll r) {
return get(1, 0, size, l, r);
}
ll get(ll v, ll l, ll r, ll ql, ll qr) {
if (ql <= l && r <= qr) {
return tree[v];
}
if (qr <= l || r <= ql) {
return -INF;
}
ll mid = (l + r) / 2;
return max(get(v * 2, l, mid, ql, qr), get(v * 2 + 1, mid, r, ql, qr)) + m[v];
}
void add(ll l, ll r, ll x) {
add(1, 0, size, l, r, x);
}
void add(ll v, ll l, ll r, ll ql, ll qr, ll x) {
if (ql <= l && r <= qr) {
tree[v] += x;
m[v] += x;
return;
}
if (qr <= l || r <= ql) {
return;
}
ll mid = (l + r) / 2;
add(v * 2, l, mid, ql, qr, x);
add(v * 2 + 1, mid, r, ql, qr, x);
tree[v] = max(tree[v * 2], tree[v * 2 + 1]) + m[v];
}
};
ll sequence(ll n, vector<ll> a) {
segment_tree_min sti(n), stir(n);
segment_tree_max sta(n), star(n);
vector<vector<ll>> all(n);
for (ll i = 0; i < n; i++) {
sti.add(i, n, 1);
sta.add(i, n, 1);
stir.add(0, i + 1, 1);
star.add(0, i + 1, 1);
all[a[i] - 1].push_back(i);
}
ll ans = 0, ns = n;
for (ll i = 0; i < n; i++) {
for (auto j : all[i]) {
sti.add(j, n, -1);
sti.add(j, n, -1);
//stir.add(0, j + 1, -1);
//star.add(0, j + 1, -1);
ns--;
}
ll lst = 0, sub = all[i].size();
for (ll j = 0; j < all[i].size(); j++) {
ll x = all[i][j];
sti.add(x, n, 1);
sta.add(x, n, -1);
ll mmi = stir.get(lst, all[i][j] + 1) - ns - sub, mma = star.get(lst, all[i][j] + 1) - ns - sub;
ll ql = all[i][j], qr = n;
ll v = 1, l = 0, r = n;
ll msi = 0, msa = 0;
while (r - l > 1) {
msi += sti.m[v];
msa += sta.m[v];
ll mid = (l + r) / 2;
if (mid < ql) {
l = mid;
v = v * 2 + 1;
continue;
}
ll mi = sti.tree[v * 2 + 1] + mmi + msi, ma = sta.tree[v * 2 + 1] + mma + msa;
if ((mi <= -1 && ma >= -1) || (mi <= 0 && ma >= 0) || (mi <= 1 && ma >= 1)) {
v = v * 2 + 1;
l = mid;
} else {
v = v * 2;
r = mid;
}
}
ans = max(ans, (ll)((lower_bound(all[i].begin(), all[i].end(), r) - all[i].begin()) - j));
sub--;
lst = all[i][j] + 1;
}
for (auto j : all[i]) {
sti.add(j, n, -1);
sta.add(j, n, -1);
stir.add(0, j + 1, -2);
star.add(0, j + 1, -2);
ns--;
}
}
return ans;
}
Compilation message
sequence.cpp: In function 'll sequence(ll, std::vector<int>)':
sequence.cpp:112:34: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
112 | for (ll j = 0; j < all[i].size(); j++) {
| ~~^~~~~~~~~~~~~~~
sequence.cpp:117:44: warning: unused variable 'qr' [-Wunused-variable]
117 | ll ql = all[i][j], qr = n;
| ^~
# |
Verdict |
Execution time |
Memory |
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 |
1 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 |
1 ms |
344 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
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 |
1 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 |
1 ms |
344 KB |
Output is correct |
10 |
Correct |
1 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 |
4 ms |
604 KB |
Output is correct |
14 |
Correct |
4 ms |
604 KB |
Output is correct |
15 |
Correct |
3 ms |
756 KB |
Output is correct |
16 |
Correct |
3 ms |
604 KB |
Output is correct |
17 |
Correct |
3 ms |
604 KB |
Output is correct |
18 |
Correct |
3 ms |
604 KB |
Output is correct |
19 |
Correct |
3 ms |
604 KB |
Output is correct |
20 |
Correct |
5 ms |
604 KB |
Output is correct |
21 |
Correct |
3 ms |
604 KB |
Output is correct |
22 |
Correct |
3 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
1230 ms |
88660 KB |
Output is correct |
3 |
Correct |
1184 ms |
88652 KB |
Output is correct |
4 |
Correct |
1166 ms |
81948 KB |
Output is correct |
5 |
Correct |
1211 ms |
90952 KB |
Output is correct |
6 |
Correct |
1184 ms |
90948 KB |
Output is correct |
7 |
Correct |
1126 ms |
82588 KB |
Output is correct |
8 |
Correct |
1125 ms |
82740 KB |
Output is correct |
9 |
Correct |
1145 ms |
82408 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1205 ms |
81948 KB |
Output is correct |
3 |
Correct |
1208 ms |
82108 KB |
Output is correct |
4 |
Correct |
1221 ms |
81864 KB |
Output is correct |
5 |
Correct |
1204 ms |
82728 KB |
Output is correct |
6 |
Correct |
1214 ms |
81856 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1431 ms |
94552 KB |
Output is correct |
2 |
Correct |
1475 ms |
94284 KB |
Output is correct |
3 |
Correct |
1490 ms |
93820 KB |
Output is correct |
4 |
Correct |
1494 ms |
97100 KB |
Output is correct |
5 |
Correct |
1324 ms |
93804 KB |
Output is correct |
6 |
Correct |
1313 ms |
93492 KB |
Output is correct |
7 |
Correct |
1165 ms |
92544 KB |
Output is correct |
8 |
Correct |
1213 ms |
92208 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
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 |
1 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 |
1 ms |
344 KB |
Output is correct |
10 |
Correct |
1 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 |
4 ms |
604 KB |
Output is correct |
14 |
Correct |
4 ms |
604 KB |
Output is correct |
15 |
Correct |
3 ms |
756 KB |
Output is correct |
16 |
Correct |
3 ms |
604 KB |
Output is correct |
17 |
Correct |
3 ms |
604 KB |
Output is correct |
18 |
Correct |
3 ms |
604 KB |
Output is correct |
19 |
Correct |
3 ms |
604 KB |
Output is correct |
20 |
Correct |
5 ms |
604 KB |
Output is correct |
21 |
Correct |
3 ms |
604 KB |
Output is correct |
22 |
Correct |
3 ms |
604 KB |
Output is correct |
23 |
Correct |
224 ms |
14440 KB |
Output is correct |
24 |
Correct |
224 ms |
14672 KB |
Output is correct |
25 |
Correct |
209 ms |
14480 KB |
Output is correct |
26 |
Correct |
220 ms |
13636 KB |
Output is correct |
27 |
Correct |
216 ms |
13636 KB |
Output is correct |
28 |
Correct |
213 ms |
13624 KB |
Output is correct |
29 |
Correct |
167 ms |
13136 KB |
Output is correct |
30 |
Correct |
172 ms |
13292 KB |
Output is correct |
31 |
Correct |
158 ms |
13520 KB |
Output is correct |
32 |
Correct |
156 ms |
15348 KB |
Output is correct |
33 |
Correct |
215 ms |
14164 KB |
Output is correct |
34 |
Correct |
219 ms |
14324 KB |
Output is correct |
35 |
Correct |
211 ms |
14308 KB |
Output is correct |
36 |
Correct |
199 ms |
14328 KB |
Output is correct |
37 |
Correct |
211 ms |
14348 KB |
Output is correct |
38 |
Correct |
213 ms |
14380 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
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 |
1 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 |
1 ms |
344 KB |
Output is correct |
10 |
Correct |
1 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 |
4 ms |
604 KB |
Output is correct |
14 |
Correct |
4 ms |
604 KB |
Output is correct |
15 |
Correct |
3 ms |
756 KB |
Output is correct |
16 |
Correct |
3 ms |
604 KB |
Output is correct |
17 |
Correct |
3 ms |
604 KB |
Output is correct |
18 |
Correct |
3 ms |
604 KB |
Output is correct |
19 |
Correct |
3 ms |
604 KB |
Output is correct |
20 |
Correct |
5 ms |
604 KB |
Output is correct |
21 |
Correct |
3 ms |
604 KB |
Output is correct |
22 |
Correct |
3 ms |
604 KB |
Output is correct |
23 |
Correct |
1230 ms |
88660 KB |
Output is correct |
24 |
Correct |
1184 ms |
88652 KB |
Output is correct |
25 |
Correct |
1166 ms |
81948 KB |
Output is correct |
26 |
Correct |
1211 ms |
90952 KB |
Output is correct |
27 |
Correct |
1184 ms |
90948 KB |
Output is correct |
28 |
Correct |
1126 ms |
82588 KB |
Output is correct |
29 |
Correct |
1125 ms |
82740 KB |
Output is correct |
30 |
Correct |
1145 ms |
82408 KB |
Output is correct |
31 |
Correct |
1205 ms |
81948 KB |
Output is correct |
32 |
Correct |
1208 ms |
82108 KB |
Output is correct |
33 |
Correct |
1221 ms |
81864 KB |
Output is correct |
34 |
Correct |
1204 ms |
82728 KB |
Output is correct |
35 |
Correct |
1214 ms |
81856 KB |
Output is correct |
36 |
Correct |
1431 ms |
94552 KB |
Output is correct |
37 |
Correct |
1475 ms |
94284 KB |
Output is correct |
38 |
Correct |
1490 ms |
93820 KB |
Output is correct |
39 |
Correct |
1494 ms |
97100 KB |
Output is correct |
40 |
Correct |
1324 ms |
93804 KB |
Output is correct |
41 |
Correct |
1313 ms |
93492 KB |
Output is correct |
42 |
Correct |
1165 ms |
92544 KB |
Output is correct |
43 |
Correct |
1213 ms |
92208 KB |
Output is correct |
44 |
Correct |
224 ms |
14440 KB |
Output is correct |
45 |
Correct |
224 ms |
14672 KB |
Output is correct |
46 |
Correct |
209 ms |
14480 KB |
Output is correct |
47 |
Correct |
220 ms |
13636 KB |
Output is correct |
48 |
Correct |
216 ms |
13636 KB |
Output is correct |
49 |
Correct |
213 ms |
13624 KB |
Output is correct |
50 |
Correct |
167 ms |
13136 KB |
Output is correct |
51 |
Correct |
172 ms |
13292 KB |
Output is correct |
52 |
Correct |
158 ms |
13520 KB |
Output is correct |
53 |
Correct |
156 ms |
15348 KB |
Output is correct |
54 |
Correct |
215 ms |
14164 KB |
Output is correct |
55 |
Correct |
219 ms |
14324 KB |
Output is correct |
56 |
Correct |
211 ms |
14308 KB |
Output is correct |
57 |
Correct |
199 ms |
14328 KB |
Output is correct |
58 |
Correct |
211 ms |
14348 KB |
Output is correct |
59 |
Correct |
213 ms |
14380 KB |
Output is correct |
60 |
Correct |
1896 ms |
91980 KB |
Output is correct |
61 |
Correct |
1898 ms |
91988 KB |
Output is correct |
62 |
Correct |
1887 ms |
92092 KB |
Output is correct |
63 |
Correct |
1781 ms |
83820 KB |
Output is correct |
64 |
Correct |
1742 ms |
84012 KB |
Output is correct |
65 |
Correct |
1774 ms |
84016 KB |
Output is correct |
66 |
Correct |
1257 ms |
81772 KB |
Output is correct |
67 |
Correct |
1216 ms |
82088 KB |
Output is correct |
68 |
Correct |
1121 ms |
84160 KB |
Output is correct |
69 |
Correct |
1157 ms |
97708 KB |
Output is correct |
70 |
Correct |
1886 ms |
91068 KB |
Output is correct |
71 |
Correct |
1845 ms |
90764 KB |
Output is correct |
72 |
Correct |
1785 ms |
90184 KB |
Output is correct |
73 |
Correct |
1824 ms |
90608 KB |
Output is correct |
74 |
Correct |
1777 ms |
90244 KB |
Output is correct |
75 |
Correct |
1783 ms |
90772 KB |
Output is correct |