#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);
}
void add(ll v, ll x) {
tree[v] += x;
m[v] += x;
}
void push(ll v) {
add(v * 2, m[v]);
add(v * 2 + 1, m[v]);
m[v] = 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;
}
push(v);
ll mid = (l + r) / 2;
return min(get(v * 2, l, mid, ql, qr), get(v * 2 + 1, mid, r, ql, qr));
}
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) {
add(v, x);
return;
}
if (qr <= l || r <= ql) {
return;
}
push(v);
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]);
}
};
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);
}
void add(ll v, ll x) {
tree[v] += x;
m[v] += x;
}
void push(ll v) {
add(v * 2, m[v]);
add(v * 2 + 1, m[v]);
m[v] = 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;
}
push(v);
ll mid = (l + r) / 2;
return max(get(v * 2, l, mid, ql, qr), get(v * 2 + 1, mid, r, ql, qr));
}
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) {
add(v, x);
return;
}
if (qr <= l || r <= ql) {
return;
}
push(v);
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]);
}
};
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;
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 m = ns;
ll mmi = stir.get(lst, all[i][j] + 1) - ns, mma = star.get(lst, all[i][j] + 1) - ns;
ll ql = all[i][j], qr = n;
ll v = 1, l = 0, r = n;
while (r - l > 1) {
sti.push(v);
sta.push(v);
ll mid = (l + r) / 2;
if (mid < ql) {
l = mid;
v = v * 2 + 1;
continue;
}
ll mi = sti.tree[v * 2 + 1] + mmi, ma = sta.tree[v * 2 + 1] + mma;
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));
}
for (auto j : all[i]) {
sti.add(j, n, -1);
sta.add(j, n, -1);
stir.add(0, j + 1, -1);
star.add(0, j + 1, -1);
ns--;
}
}
return ans;
}
Compilation message
sequence.cpp: In function 'll sequence(ll, std::vector<int>)':
sequence.cpp:132:34: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
132 | for (ll j = 0; j < all[i].size(); j++) {
| ~~^~~~~~~~~~~~~~~
sequence.cpp:136:28: warning: unused variable 'm' [-Wunused-variable]
136 | ll m = ns;
| ^
sequence.cpp:138:44: warning: unused variable 'qr' [-Wunused-variable]
138 | ll ql = all[i][j], qr = n;
| ^~
# |
Verdict |
Execution time |
Memory |
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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 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 |
1 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 |
# |
Verdict |
Execution time |
Memory |
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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 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 |
1 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 |
5 ms |
600 KB |
Output is correct |
14 |
Correct |
5 ms |
600 KB |
Output is correct |
15 |
Correct |
4 ms |
604 KB |
Output is correct |
16 |
Correct |
4 ms |
604 KB |
Output is correct |
17 |
Correct |
4 ms |
604 KB |
Output is correct |
18 |
Correct |
4 ms |
604 KB |
Output is correct |
19 |
Correct |
4 ms |
604 KB |
Output is correct |
20 |
Correct |
4 ms |
780 KB |
Output is correct |
21 |
Correct |
5 ms |
768 KB |
Output is correct |
22 |
Correct |
4 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Execution timed out |
2037 ms |
88652 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Execution timed out |
2041 ms |
81848 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
2058 ms |
94296 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 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 |
1 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 |
5 ms |
600 KB |
Output is correct |
14 |
Correct |
5 ms |
600 KB |
Output is correct |
15 |
Correct |
4 ms |
604 KB |
Output is correct |
16 |
Correct |
4 ms |
604 KB |
Output is correct |
17 |
Correct |
4 ms |
604 KB |
Output is correct |
18 |
Correct |
4 ms |
604 KB |
Output is correct |
19 |
Correct |
4 ms |
604 KB |
Output is correct |
20 |
Correct |
4 ms |
780 KB |
Output is correct |
21 |
Correct |
5 ms |
768 KB |
Output is correct |
22 |
Correct |
4 ms |
604 KB |
Output is correct |
23 |
Correct |
326 ms |
14672 KB |
Output is correct |
24 |
Correct |
306 ms |
14560 KB |
Output is correct |
25 |
Correct |
310 ms |
14676 KB |
Output is correct |
26 |
Correct |
302 ms |
13396 KB |
Output is correct |
27 |
Correct |
304 ms |
13636 KB |
Output is correct |
28 |
Correct |
298 ms |
13504 KB |
Output is correct |
29 |
Correct |
285 ms |
13368 KB |
Output is correct |
30 |
Correct |
291 ms |
13440 KB |
Output is correct |
31 |
Correct |
345 ms |
13520 KB |
Output is correct |
32 |
Correct |
311 ms |
15472 KB |
Output is correct |
33 |
Correct |
317 ms |
14364 KB |
Output is correct |
34 |
Correct |
304 ms |
14356 KB |
Output is correct |
35 |
Correct |
305 ms |
14164 KB |
Output is correct |
36 |
Correct |
308 ms |
14284 KB |
Output is correct |
37 |
Correct |
306 ms |
14416 KB |
Output is correct |
38 |
Correct |
297 ms |
14160 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
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 |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 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 |
1 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 |
5 ms |
600 KB |
Output is correct |
14 |
Correct |
5 ms |
600 KB |
Output is correct |
15 |
Correct |
4 ms |
604 KB |
Output is correct |
16 |
Correct |
4 ms |
604 KB |
Output is correct |
17 |
Correct |
4 ms |
604 KB |
Output is correct |
18 |
Correct |
4 ms |
604 KB |
Output is correct |
19 |
Correct |
4 ms |
604 KB |
Output is correct |
20 |
Correct |
4 ms |
780 KB |
Output is correct |
21 |
Correct |
5 ms |
768 KB |
Output is correct |
22 |
Correct |
4 ms |
604 KB |
Output is correct |
23 |
Execution timed out |
2037 ms |
88652 KB |
Time limit exceeded |
24 |
Halted |
0 ms |
0 KB |
- |