#include<bits/stdc++.h>
#include<fstream>
using namespace std;
ifstream fin("VNOICUP.INP");
ofstream fout("VNOICUP.OUT");
#define sz(a) (int)a.size()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
const ld PI = 3.14159265359;
using u128 = __uint128_t;
//const int x[4] = {1, -1, 0, 0};
//const int y[4] = {0, 0, 1, -1};
const ll mod = 1e9 + 9;
const int mxn = 1e6 + 5, mxq = 2e5 + 5, sq = 400, mxv = 1e5 + 5;
//const int base = (1 << 18);
const int inf = 1e9, neg = -69420;
struct DSU{
vt<pii>past_p, past_sz;
vt<int>checkpoint;
int p[mxn + 1], sz[mxn + 1];
void init(){
for(int i = 1; i <= mxn; i++){
p[i] = i; sz[i] = 1;
}
past_sz.clear(); past_p.clear(); checkpoint.clear();
}
int fp(int a){
if(p[a] == a)return(a);
return(fp(p[a]));
}
bool check(int u, int v){
return(fp(u) == fp(v));
}
void unon(int a, int b){
a = fp(a); b = fp(b);
if(a > b)swap(a, b);
//past_sz.pb({a, sz[a]}); past_p.pb({b, p[b]});
if(a != b){
sz[a] += sz[b]; p[b] = a;
}
}
void rollback(){
//int before = p[past_p.back().fi], after = past_p.back().se;
//if(before != past_p.back().fi && after == past_p.back().fi)cnt++;
p[past_p.back().fi] = past_p.back().se; past_p.pop_back();
sz[past_sz.back().fi] = past_sz.back().se; past_sz.pop_back();
}
void save(){
checkpoint.pb(past_sz.size());
}
void to_last(){
while(past_sz.size() != checkpoint.back())rollback();
checkpoint.pop_back();
}
};
DSU dsu;
int n, d;
int a[mxn + 1], dp[mxn + 1];
vt<int>idx[mxn + 1];
vt<int>comp;
int find(int x){
return(lower_bound(comp.begin(), comp.end(), x) - comp.begin() + 1);
}
void compress(){
for(int i = 1; i <= n; i++)comp.pb(a[i]);
sort(comp.begin(), comp.end());
for(int i = 1; i <= n; i++){
a[i] = find(a[i]);
}
}
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n >> d;
dsu.init();
for(int i = 1; i <= n; i++)cin >> a[i];
compress();
for(int i = 1; i <= n; i++){
idx[a[i]].pb(i); dp[i] = -1;
}
set<int>save;
int ans = 1;
for(int i = 1; i <= n; i++){
if(sz(idx[i]) == 0)continue;
reverse(idx[i].begin(), idx[i].end());
for(int j = 0; j < sz(idx[i]); j++){
int x = idx[i][j];
auto lw = save.lower_bound(x);
if(lw != save.begin()){
--lw;
if((x - *lw) <= d){
dsu.unon(x, *lw);
}
}
auto hg = save.upper_bound(x);
if(hg != save.end()){
if((*hg - x) <= d){
dsu.unon(x, *hg);
}
}
int lft = dsu.fp(x);
dp[x] = 1;
for(int l = x - 1; l >= lft; l--){
dp[x] = max(dp[x], dp[l] + 1);
}
save.insert(x);
ans = max(ans, dp[x]);
//cout << x << " " << dp[x] << "\n";
}
}
//for(int i = 1; i <= n; i++)cout << dp[i] << ' ';
cout << ans;
}
Compilation message
Main.cpp: In member function 'void DSU::to_last()':
Main.cpp:61:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} [-Wsign-compare]
61 | while(past_sz.size() != checkpoint.back())rollback();
| ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
31572 KB |
Output is correct |
2 |
Correct |
17 ms |
31632 KB |
Output is correct |
3 |
Correct |
18 ms |
31572 KB |
Output is correct |
4 |
Correct |
17 ms |
31572 KB |
Output is correct |
5 |
Correct |
17 ms |
31640 KB |
Output is correct |
6 |
Correct |
17 ms |
31640 KB |
Output is correct |
7 |
Correct |
19 ms |
31564 KB |
Output is correct |
8 |
Correct |
17 ms |
31632 KB |
Output is correct |
9 |
Correct |
17 ms |
31572 KB |
Output is correct |
10 |
Correct |
17 ms |
31572 KB |
Output is correct |
11 |
Correct |
16 ms |
31648 KB |
Output is correct |
12 |
Correct |
19 ms |
31656 KB |
Output is correct |
13 |
Correct |
17 ms |
31572 KB |
Output is correct |
14 |
Correct |
17 ms |
31700 KB |
Output is correct |
15 |
Correct |
16 ms |
31660 KB |
Output is correct |
16 |
Correct |
17 ms |
31632 KB |
Output is correct |
17 |
Correct |
16 ms |
31572 KB |
Output is correct |
18 |
Correct |
17 ms |
31640 KB |
Output is correct |
19 |
Correct |
16 ms |
31572 KB |
Output is correct |
20 |
Correct |
17 ms |
31660 KB |
Output is correct |
21 |
Correct |
17 ms |
31664 KB |
Output is correct |
22 |
Correct |
16 ms |
31572 KB |
Output is correct |
23 |
Correct |
17 ms |
31572 KB |
Output is correct |
24 |
Correct |
16 ms |
31572 KB |
Output is correct |
25 |
Correct |
17 ms |
31560 KB |
Output is correct |
26 |
Correct |
16 ms |
31572 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
31572 KB |
Output is correct |
2 |
Correct |
17 ms |
31632 KB |
Output is correct |
3 |
Correct |
18 ms |
31572 KB |
Output is correct |
4 |
Correct |
17 ms |
31572 KB |
Output is correct |
5 |
Correct |
17 ms |
31640 KB |
Output is correct |
6 |
Correct |
17 ms |
31640 KB |
Output is correct |
7 |
Correct |
19 ms |
31564 KB |
Output is correct |
8 |
Correct |
17 ms |
31632 KB |
Output is correct |
9 |
Correct |
17 ms |
31572 KB |
Output is correct |
10 |
Correct |
17 ms |
31572 KB |
Output is correct |
11 |
Correct |
16 ms |
31648 KB |
Output is correct |
12 |
Correct |
19 ms |
31656 KB |
Output is correct |
13 |
Correct |
17 ms |
31572 KB |
Output is correct |
14 |
Correct |
17 ms |
31700 KB |
Output is correct |
15 |
Correct |
16 ms |
31660 KB |
Output is correct |
16 |
Correct |
17 ms |
31632 KB |
Output is correct |
17 |
Correct |
16 ms |
31572 KB |
Output is correct |
18 |
Correct |
17 ms |
31640 KB |
Output is correct |
19 |
Correct |
16 ms |
31572 KB |
Output is correct |
20 |
Correct |
17 ms |
31660 KB |
Output is correct |
21 |
Correct |
17 ms |
31664 KB |
Output is correct |
22 |
Correct |
16 ms |
31572 KB |
Output is correct |
23 |
Correct |
17 ms |
31572 KB |
Output is correct |
24 |
Correct |
16 ms |
31572 KB |
Output is correct |
25 |
Correct |
17 ms |
31560 KB |
Output is correct |
26 |
Correct |
16 ms |
31572 KB |
Output is correct |
27 |
Correct |
17 ms |
31636 KB |
Output is correct |
28 |
Correct |
17 ms |
31640 KB |
Output is correct |
29 |
Correct |
16 ms |
31604 KB |
Output is correct |
30 |
Correct |
17 ms |
31700 KB |
Output is correct |
31 |
Correct |
17 ms |
31684 KB |
Output is correct |
32 |
Correct |
17 ms |
31636 KB |
Output is correct |
33 |
Correct |
17 ms |
31700 KB |
Output is correct |
34 |
Correct |
17 ms |
31672 KB |
Output is correct |
35 |
Correct |
16 ms |
31648 KB |
Output is correct |
36 |
Correct |
17 ms |
31672 KB |
Output is correct |
37 |
Correct |
18 ms |
31612 KB |
Output is correct |
38 |
Correct |
16 ms |
31700 KB |
Output is correct |
39 |
Correct |
18 ms |
31648 KB |
Output is correct |
40 |
Correct |
16 ms |
31704 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
31572 KB |
Output is correct |
2 |
Correct |
17 ms |
31632 KB |
Output is correct |
3 |
Correct |
18 ms |
31572 KB |
Output is correct |
4 |
Correct |
17 ms |
31572 KB |
Output is correct |
5 |
Correct |
17 ms |
31640 KB |
Output is correct |
6 |
Correct |
17 ms |
31640 KB |
Output is correct |
7 |
Correct |
19 ms |
31564 KB |
Output is correct |
8 |
Correct |
17 ms |
31632 KB |
Output is correct |
9 |
Correct |
17 ms |
31572 KB |
Output is correct |
10 |
Correct |
17 ms |
31572 KB |
Output is correct |
11 |
Correct |
16 ms |
31648 KB |
Output is correct |
12 |
Correct |
19 ms |
31656 KB |
Output is correct |
13 |
Correct |
17 ms |
31572 KB |
Output is correct |
14 |
Correct |
17 ms |
31700 KB |
Output is correct |
15 |
Correct |
16 ms |
31660 KB |
Output is correct |
16 |
Correct |
17 ms |
31632 KB |
Output is correct |
17 |
Correct |
16 ms |
31572 KB |
Output is correct |
18 |
Correct |
17 ms |
31640 KB |
Output is correct |
19 |
Correct |
16 ms |
31572 KB |
Output is correct |
20 |
Correct |
17 ms |
31660 KB |
Output is correct |
21 |
Correct |
17 ms |
31664 KB |
Output is correct |
22 |
Correct |
16 ms |
31572 KB |
Output is correct |
23 |
Correct |
17 ms |
31572 KB |
Output is correct |
24 |
Correct |
16 ms |
31572 KB |
Output is correct |
25 |
Correct |
17 ms |
31560 KB |
Output is correct |
26 |
Correct |
16 ms |
31572 KB |
Output is correct |
27 |
Correct |
17 ms |
31636 KB |
Output is correct |
28 |
Correct |
17 ms |
31640 KB |
Output is correct |
29 |
Correct |
16 ms |
31604 KB |
Output is correct |
30 |
Correct |
17 ms |
31700 KB |
Output is correct |
31 |
Correct |
17 ms |
31684 KB |
Output is correct |
32 |
Correct |
17 ms |
31636 KB |
Output is correct |
33 |
Correct |
17 ms |
31700 KB |
Output is correct |
34 |
Correct |
17 ms |
31672 KB |
Output is correct |
35 |
Correct |
16 ms |
31648 KB |
Output is correct |
36 |
Correct |
17 ms |
31672 KB |
Output is correct |
37 |
Correct |
18 ms |
31612 KB |
Output is correct |
38 |
Correct |
16 ms |
31700 KB |
Output is correct |
39 |
Correct |
18 ms |
31648 KB |
Output is correct |
40 |
Correct |
16 ms |
31704 KB |
Output is correct |
41 |
Correct |
21 ms |
32212 KB |
Output is correct |
42 |
Correct |
21 ms |
32252 KB |
Output is correct |
43 |
Correct |
22 ms |
32132 KB |
Output is correct |
44 |
Correct |
33 ms |
32088 KB |
Output is correct |
45 |
Correct |
48 ms |
32192 KB |
Output is correct |
46 |
Correct |
45 ms |
32336 KB |
Output is correct |
47 |
Correct |
33 ms |
32212 KB |
Output is correct |
48 |
Correct |
34 ms |
32340 KB |
Output is correct |
49 |
Correct |
32 ms |
32292 KB |
Output is correct |
50 |
Correct |
39 ms |
32272 KB |
Output is correct |
51 |
Correct |
21 ms |
32284 KB |
Output is correct |
52 |
Correct |
22 ms |
32340 KB |
Output is correct |
53 |
Correct |
43 ms |
32276 KB |
Output is correct |
54 |
Correct |
43 ms |
32324 KB |
Output is correct |
55 |
Correct |
45 ms |
32296 KB |
Output is correct |
56 |
Correct |
44 ms |
32240 KB |
Output is correct |
57 |
Correct |
43 ms |
32272 KB |
Output is correct |
58 |
Correct |
44 ms |
32252 KB |
Output is correct |
59 |
Correct |
43 ms |
32240 KB |
Output is correct |
60 |
Correct |
43 ms |
32236 KB |
Output is correct |
61 |
Correct |
42 ms |
32300 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
160 ms |
50420 KB |
Output is correct |
2 |
Correct |
149 ms |
53124 KB |
Output is correct |
3 |
Correct |
201 ms |
53644 KB |
Output is correct |
4 |
Correct |
335 ms |
60064 KB |
Output is correct |
5 |
Correct |
288 ms |
61496 KB |
Output is correct |
6 |
Correct |
336 ms |
61456 KB |
Output is correct |
7 |
Execution timed out |
4053 ms |
51560 KB |
Time limit exceeded |
8 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
163 ms |
50352 KB |
Output is correct |
2 |
Execution timed out |
4032 ms |
40636 KB |
Time limit exceeded |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
31572 KB |
Output is correct |
2 |
Correct |
17 ms |
31632 KB |
Output is correct |
3 |
Correct |
18 ms |
31572 KB |
Output is correct |
4 |
Correct |
17 ms |
31572 KB |
Output is correct |
5 |
Correct |
17 ms |
31640 KB |
Output is correct |
6 |
Correct |
17 ms |
31640 KB |
Output is correct |
7 |
Correct |
19 ms |
31564 KB |
Output is correct |
8 |
Correct |
17 ms |
31632 KB |
Output is correct |
9 |
Correct |
17 ms |
31572 KB |
Output is correct |
10 |
Correct |
17 ms |
31572 KB |
Output is correct |
11 |
Correct |
16 ms |
31648 KB |
Output is correct |
12 |
Correct |
19 ms |
31656 KB |
Output is correct |
13 |
Correct |
17 ms |
31572 KB |
Output is correct |
14 |
Correct |
17 ms |
31700 KB |
Output is correct |
15 |
Correct |
16 ms |
31660 KB |
Output is correct |
16 |
Correct |
17 ms |
31632 KB |
Output is correct |
17 |
Correct |
16 ms |
31572 KB |
Output is correct |
18 |
Correct |
17 ms |
31640 KB |
Output is correct |
19 |
Correct |
16 ms |
31572 KB |
Output is correct |
20 |
Correct |
17 ms |
31660 KB |
Output is correct |
21 |
Correct |
17 ms |
31664 KB |
Output is correct |
22 |
Correct |
16 ms |
31572 KB |
Output is correct |
23 |
Correct |
17 ms |
31572 KB |
Output is correct |
24 |
Correct |
16 ms |
31572 KB |
Output is correct |
25 |
Correct |
17 ms |
31560 KB |
Output is correct |
26 |
Correct |
16 ms |
31572 KB |
Output is correct |
27 |
Correct |
17 ms |
31636 KB |
Output is correct |
28 |
Correct |
17 ms |
31640 KB |
Output is correct |
29 |
Correct |
16 ms |
31604 KB |
Output is correct |
30 |
Correct |
17 ms |
31700 KB |
Output is correct |
31 |
Correct |
17 ms |
31684 KB |
Output is correct |
32 |
Correct |
17 ms |
31636 KB |
Output is correct |
33 |
Correct |
17 ms |
31700 KB |
Output is correct |
34 |
Correct |
17 ms |
31672 KB |
Output is correct |
35 |
Correct |
16 ms |
31648 KB |
Output is correct |
36 |
Correct |
17 ms |
31672 KB |
Output is correct |
37 |
Correct |
18 ms |
31612 KB |
Output is correct |
38 |
Correct |
16 ms |
31700 KB |
Output is correct |
39 |
Correct |
18 ms |
31648 KB |
Output is correct |
40 |
Correct |
16 ms |
31704 KB |
Output is correct |
41 |
Correct |
21 ms |
32212 KB |
Output is correct |
42 |
Correct |
21 ms |
32252 KB |
Output is correct |
43 |
Correct |
22 ms |
32132 KB |
Output is correct |
44 |
Correct |
33 ms |
32088 KB |
Output is correct |
45 |
Correct |
48 ms |
32192 KB |
Output is correct |
46 |
Correct |
45 ms |
32336 KB |
Output is correct |
47 |
Correct |
33 ms |
32212 KB |
Output is correct |
48 |
Correct |
34 ms |
32340 KB |
Output is correct |
49 |
Correct |
32 ms |
32292 KB |
Output is correct |
50 |
Correct |
39 ms |
32272 KB |
Output is correct |
51 |
Correct |
21 ms |
32284 KB |
Output is correct |
52 |
Correct |
22 ms |
32340 KB |
Output is correct |
53 |
Correct |
43 ms |
32276 KB |
Output is correct |
54 |
Correct |
43 ms |
32324 KB |
Output is correct |
55 |
Correct |
45 ms |
32296 KB |
Output is correct |
56 |
Correct |
44 ms |
32240 KB |
Output is correct |
57 |
Correct |
43 ms |
32272 KB |
Output is correct |
58 |
Correct |
44 ms |
32252 KB |
Output is correct |
59 |
Correct |
43 ms |
32240 KB |
Output is correct |
60 |
Correct |
43 ms |
32236 KB |
Output is correct |
61 |
Correct |
42 ms |
32300 KB |
Output is correct |
62 |
Correct |
160 ms |
50420 KB |
Output is correct |
63 |
Correct |
149 ms |
53124 KB |
Output is correct |
64 |
Correct |
201 ms |
53644 KB |
Output is correct |
65 |
Correct |
335 ms |
60064 KB |
Output is correct |
66 |
Correct |
288 ms |
61496 KB |
Output is correct |
67 |
Correct |
336 ms |
61456 KB |
Output is correct |
68 |
Execution timed out |
4053 ms |
51560 KB |
Time limit exceeded |
69 |
Halted |
0 ms |
0 KB |
- |