#include "sequence.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ii pair<ll,ll>
const ll maxn=5e5+5;
ll pref[maxn][2];
ll suff[maxn][2];
vector<int> adj[maxn];
struct node{
ll s,e,m,mn,mx,flag;
node *l,*r;
node(ll _s, ll _e){
s=_s,e=_e,m=(s+e)>>1,mn=0,mx=0,flag=0;
if (s!=e){
l=new node(s,m);
r=new node(m+1,e);
}
}
void prop(){
if (!flag) return;
mn+=flag;
mx+=flag;
if (s==e){
flag=0;
return;
}
l->flag+=flag;
r->flag+=flag;
flag=0;
return;
}
void upd(ll x, ll y, ll v){
if (x<=s && e<=y){
flag+=v;
return;
}
if (x>m) r->upd(x,y,v);
else if (y<=m) l->upd(x,y,v);
else l->upd(x,y,v),r->upd(x,y,v);
l->prop(),r->prop();
mn=min(l->mn,r->mn);
mx=max(l->mx,r->mx);
}
ll queryMin(ll x, ll y){
prop();
if (x<=s && e<=y) return mn;
if (x>m) return r->queryMin(x,y);
if (y<=m) return l->queryMin(x,y);
return min(l->queryMin(x,y),r->queryMin(x,y));
}
ll queryMax(ll x, ll y){
prop();
if (x<=s && e<=y) return mx;
if (x>m) return r->queryMax(x,y);
if (y<=m) return l->queryMax(x,y);
return max(l->queryMax(x,y),r->queryMax(x,y));
}
}*root;
ll n;
bool check(ll m){
for (int i=1;i<=n;i++){
for (int j=0;j+m<=adj[i].size();j++){
ll A=pref[adj[i][j]][0];
ll B=pref[adj[i][j]][1];
ll C=suff[adj[i][j+m-1]][0];
ll D=suff[adj[i][j+m-1]][1];
if (max(A,C)-m<= min(B,D)) return true;
}
}
return false;
}
int sequence(int N, std::vector<int> A) {
n=N;
for (int i=0;i<N;i++){
adj[A[i]].emplace_back(i+1);
}
root=new node(0,N);
for (int i=1;i<=N;i++){
root->upd(i,N,1);
}
for (int i=1;i<=N;i++){
for (auto u:adj[i]){
root->upd(u,N,-1);
}
for (int j=0;j<adj[i].size();j++){
ll u=adj[i][j];
pref[u][0]=root->queryMin(0,u-1);
pref[u][1]=root->queryMax(0,u-1);
if (j!=0){
pref[u][0]=min(pref[u][0],pref[adj[i][j-1]][0]-1);
pref[u][1]=max(pref[u][1],pref[adj[i][j-1]][1]+1);
}
}
for (int j=adj[i].size()-1;j>=0;j--){
ll u=adj[i][j];
suff[u][0]=root->queryMin(u,N);
suff[u][1]=root->queryMax(u,N);
if (j!=adj[i].size()-1){
suff[u][0]=min(suff[u][0],suff[adj[i][j+1]][0]-1);
suff[u][1]=max(suff[u][1],suff[adj[i][j+1]][1]+1);
}
}
for (auto u:adj[i]){
root->upd(u,N,-1);
}
}
ll l=1,r=N+1,m;
while (l!=r-1){
m=(l+r)>>1;
if (check(m)) l=m;
else r=m;
}
return l;
}
Compilation message
sequence.cpp: In function 'bool check(long long int)':
sequence.cpp:66:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
66 | for (int j=0;j+m<=adj[i].size();j++){
| ~~~^~~~~~~~~~~~~~~
sequence.cpp: In function 'int sequence(int, std::vector<int>)':
sequence.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
89 | for (int j=0;j<adj[i].size();j++){
| ~^~~~~~~~~~~~~~
sequence.cpp:103:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
103 | if (j!=adj[i].size()-1){
| ~^~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
6 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
11988 KB |
Output is correct |
4 |
Correct |
7 ms |
12032 KB |
Output is correct |
5 |
Correct |
6 ms |
12080 KB |
Output is correct |
6 |
Correct |
6 ms |
11988 KB |
Output is correct |
7 |
Correct |
6 ms |
11988 KB |
Output is correct |
8 |
Correct |
6 ms |
12080 KB |
Output is correct |
9 |
Correct |
6 ms |
11988 KB |
Output is correct |
10 |
Correct |
6 ms |
11988 KB |
Output is correct |
11 |
Correct |
6 ms |
11988 KB |
Output is correct |
12 |
Correct |
7 ms |
11988 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
6 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
11988 KB |
Output is correct |
4 |
Correct |
7 ms |
12032 KB |
Output is correct |
5 |
Correct |
6 ms |
12080 KB |
Output is correct |
6 |
Correct |
6 ms |
11988 KB |
Output is correct |
7 |
Correct |
6 ms |
11988 KB |
Output is correct |
8 |
Correct |
6 ms |
12080 KB |
Output is correct |
9 |
Correct |
6 ms |
11988 KB |
Output is correct |
10 |
Correct |
6 ms |
11988 KB |
Output is correct |
11 |
Correct |
6 ms |
11988 KB |
Output is correct |
12 |
Correct |
7 ms |
11988 KB |
Output is correct |
13 |
Correct |
8 ms |
12480 KB |
Output is correct |
14 |
Correct |
9 ms |
12484 KB |
Output is correct |
15 |
Correct |
9 ms |
12456 KB |
Output is correct |
16 |
Correct |
9 ms |
12372 KB |
Output is correct |
17 |
Correct |
8 ms |
12372 KB |
Output is correct |
18 |
Correct |
8 ms |
12500 KB |
Output is correct |
19 |
Correct |
12 ms |
12448 KB |
Output is correct |
20 |
Correct |
9 ms |
12372 KB |
Output is correct |
21 |
Correct |
9 ms |
12372 KB |
Output is correct |
22 |
Correct |
9 ms |
12372 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
709 ms |
119900 KB |
Output is correct |
3 |
Correct |
732 ms |
119876 KB |
Output is correct |
4 |
Correct |
613 ms |
111844 KB |
Output is correct |
5 |
Correct |
703 ms |
118952 KB |
Output is correct |
6 |
Correct |
701 ms |
118832 KB |
Output is correct |
7 |
Correct |
648 ms |
112248 KB |
Output is correct |
8 |
Correct |
615 ms |
112328 KB |
Output is correct |
9 |
Correct |
619 ms |
111832 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
720 ms |
111828 KB |
Output is correct |
3 |
Correct |
731 ms |
111972 KB |
Output is correct |
4 |
Correct |
708 ms |
111864 KB |
Output is correct |
5 |
Correct |
727 ms |
111876 KB |
Output is correct |
6 |
Correct |
681 ms |
111880 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1176 ms |
125500 KB |
Output is correct |
2 |
Correct |
1122 ms |
125516 KB |
Output is correct |
3 |
Correct |
1189 ms |
125064 KB |
Output is correct |
4 |
Correct |
1157 ms |
125012 KB |
Output is correct |
5 |
Correct |
917 ms |
121656 KB |
Output is correct |
6 |
Correct |
941 ms |
121536 KB |
Output is correct |
7 |
Correct |
711 ms |
120508 KB |
Output is correct |
8 |
Correct |
697 ms |
120068 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
6 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
11988 KB |
Output is correct |
4 |
Correct |
7 ms |
12032 KB |
Output is correct |
5 |
Correct |
6 ms |
12080 KB |
Output is correct |
6 |
Correct |
6 ms |
11988 KB |
Output is correct |
7 |
Correct |
6 ms |
11988 KB |
Output is correct |
8 |
Correct |
6 ms |
12080 KB |
Output is correct |
9 |
Correct |
6 ms |
11988 KB |
Output is correct |
10 |
Correct |
6 ms |
11988 KB |
Output is correct |
11 |
Correct |
6 ms |
11988 KB |
Output is correct |
12 |
Correct |
7 ms |
11988 KB |
Output is correct |
13 |
Correct |
8 ms |
12480 KB |
Output is correct |
14 |
Correct |
9 ms |
12484 KB |
Output is correct |
15 |
Correct |
9 ms |
12456 KB |
Output is correct |
16 |
Correct |
9 ms |
12372 KB |
Output is correct |
17 |
Correct |
8 ms |
12372 KB |
Output is correct |
18 |
Correct |
8 ms |
12500 KB |
Output is correct |
19 |
Correct |
12 ms |
12448 KB |
Output is correct |
20 |
Correct |
9 ms |
12372 KB |
Output is correct |
21 |
Correct |
9 ms |
12372 KB |
Output is correct |
22 |
Correct |
9 ms |
12372 KB |
Output is correct |
23 |
Correct |
174 ms |
29296 KB |
Output is correct |
24 |
Correct |
176 ms |
29296 KB |
Output is correct |
25 |
Correct |
177 ms |
29304 KB |
Output is correct |
26 |
Correct |
159 ms |
28284 KB |
Output is correct |
27 |
Correct |
172 ms |
28300 KB |
Output is correct |
28 |
Correct |
168 ms |
28276 KB |
Output is correct |
29 |
Correct |
124 ms |
27972 KB |
Output is correct |
30 |
Correct |
119 ms |
27976 KB |
Output is correct |
31 |
Correct |
95 ms |
27944 KB |
Output is correct |
32 |
Correct |
101 ms |
30180 KB |
Output is correct |
33 |
Correct |
167 ms |
28988 KB |
Output is correct |
34 |
Correct |
171 ms |
29136 KB |
Output is correct |
35 |
Correct |
162 ms |
29004 KB |
Output is correct |
36 |
Correct |
174 ms |
29068 KB |
Output is correct |
37 |
Correct |
164 ms |
29096 KB |
Output is correct |
38 |
Correct |
167 ms |
29124 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
6 ms |
11988 KB |
Output is correct |
2 |
Correct |
6 ms |
11988 KB |
Output is correct |
3 |
Correct |
6 ms |
11988 KB |
Output is correct |
4 |
Correct |
7 ms |
12032 KB |
Output is correct |
5 |
Correct |
6 ms |
12080 KB |
Output is correct |
6 |
Correct |
6 ms |
11988 KB |
Output is correct |
7 |
Correct |
6 ms |
11988 KB |
Output is correct |
8 |
Correct |
6 ms |
12080 KB |
Output is correct |
9 |
Correct |
6 ms |
11988 KB |
Output is correct |
10 |
Correct |
6 ms |
11988 KB |
Output is correct |
11 |
Correct |
6 ms |
11988 KB |
Output is correct |
12 |
Correct |
7 ms |
11988 KB |
Output is correct |
13 |
Correct |
8 ms |
12480 KB |
Output is correct |
14 |
Correct |
9 ms |
12484 KB |
Output is correct |
15 |
Correct |
9 ms |
12456 KB |
Output is correct |
16 |
Correct |
9 ms |
12372 KB |
Output is correct |
17 |
Correct |
8 ms |
12372 KB |
Output is correct |
18 |
Correct |
8 ms |
12500 KB |
Output is correct |
19 |
Correct |
12 ms |
12448 KB |
Output is correct |
20 |
Correct |
9 ms |
12372 KB |
Output is correct |
21 |
Correct |
9 ms |
12372 KB |
Output is correct |
22 |
Correct |
9 ms |
12372 KB |
Output is correct |
23 |
Correct |
709 ms |
119900 KB |
Output is correct |
24 |
Correct |
732 ms |
119876 KB |
Output is correct |
25 |
Correct |
613 ms |
111844 KB |
Output is correct |
26 |
Correct |
703 ms |
118952 KB |
Output is correct |
27 |
Correct |
701 ms |
118832 KB |
Output is correct |
28 |
Correct |
648 ms |
112248 KB |
Output is correct |
29 |
Correct |
615 ms |
112328 KB |
Output is correct |
30 |
Correct |
619 ms |
111832 KB |
Output is correct |
31 |
Correct |
720 ms |
111828 KB |
Output is correct |
32 |
Correct |
731 ms |
111972 KB |
Output is correct |
33 |
Correct |
708 ms |
111864 KB |
Output is correct |
34 |
Correct |
727 ms |
111876 KB |
Output is correct |
35 |
Correct |
681 ms |
111880 KB |
Output is correct |
36 |
Correct |
1176 ms |
125500 KB |
Output is correct |
37 |
Correct |
1122 ms |
125516 KB |
Output is correct |
38 |
Correct |
1189 ms |
125064 KB |
Output is correct |
39 |
Correct |
1157 ms |
125012 KB |
Output is correct |
40 |
Correct |
917 ms |
121656 KB |
Output is correct |
41 |
Correct |
941 ms |
121536 KB |
Output is correct |
42 |
Correct |
711 ms |
120508 KB |
Output is correct |
43 |
Correct |
697 ms |
120068 KB |
Output is correct |
44 |
Correct |
174 ms |
29296 KB |
Output is correct |
45 |
Correct |
176 ms |
29296 KB |
Output is correct |
46 |
Correct |
177 ms |
29304 KB |
Output is correct |
47 |
Correct |
159 ms |
28284 KB |
Output is correct |
48 |
Correct |
172 ms |
28300 KB |
Output is correct |
49 |
Correct |
168 ms |
28276 KB |
Output is correct |
50 |
Correct |
124 ms |
27972 KB |
Output is correct |
51 |
Correct |
119 ms |
27976 KB |
Output is correct |
52 |
Correct |
95 ms |
27944 KB |
Output is correct |
53 |
Correct |
101 ms |
30180 KB |
Output is correct |
54 |
Correct |
167 ms |
28988 KB |
Output is correct |
55 |
Correct |
171 ms |
29136 KB |
Output is correct |
56 |
Correct |
162 ms |
29004 KB |
Output is correct |
57 |
Correct |
174 ms |
29068 KB |
Output is correct |
58 |
Correct |
164 ms |
29096 KB |
Output is correct |
59 |
Correct |
167 ms |
29124 KB |
Output is correct |
60 |
Correct |
1430 ms |
119808 KB |
Output is correct |
61 |
Correct |
1420 ms |
120000 KB |
Output is correct |
62 |
Correct |
1448 ms |
119912 KB |
Output is correct |
63 |
Correct |
1411 ms |
112768 KB |
Output is correct |
64 |
Correct |
1377 ms |
112860 KB |
Output is correct |
65 |
Correct |
1383 ms |
112756 KB |
Output is correct |
66 |
Correct |
810 ms |
111852 KB |
Output is correct |
67 |
Correct |
825 ms |
111864 KB |
Output is correct |
68 |
Correct |
638 ms |
111820 KB |
Output is correct |
69 |
Correct |
644 ms |
125496 KB |
Output is correct |
70 |
Correct |
1396 ms |
118860 KB |
Output is correct |
71 |
Correct |
1369 ms |
118816 KB |
Output is correct |
72 |
Correct |
1353 ms |
118248 KB |
Output is correct |
73 |
Correct |
1360 ms |
118680 KB |
Output is correct |
74 |
Correct |
1351 ms |
118180 KB |
Output is correct |
75 |
Correct |
1417 ms |
118596 KB |
Output is correct |