#include <bits/stdc++.h>
#define pb push_back
#define ll long long
#define pii pair<int, int>
#define xx first
#define yy second
#define MAXN 200010
#define endl "\n"
using namespace std;
int n, x, a[MAXN], b[MAXN], dp[MAXN], lvd[MAXN], ress=-1; ///lvd=lis veci desno
int binarna(int cnt, int k)
{
int l=0, r=cnt-1;
int ret=-1;
while (l<=r)
{
int mid=l+(r-l)/2;
if (dp[mid]<k)
{
ret=mid;
l=mid+1;
}
else
r=mid-1;
}
return ret;
}
int prviveci(int cnt, int k)
{
int l=0, r=cnt-1;
int ret=-1;
while (l<=r)
{
int mid=l+(r-l)/2;
if (dp[mid]>k)
{
ret=mid;
r=mid-1;
}
else
l=mid+1;
}
return ret;
}
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin>>n>>x;
int maxx=-1;
for (int i=0; i<n; i++) { cin>>a[i]; maxx=max(maxx, a[i]); }
for (int i=0; i<n; i++) b[i]=maxx-a[i];
dp[0]=b[n-1];
int cnt=1;
lvd[n-1]=0; lvd[n-2]=0;
if (a[n-1]>(a[n-2]-x)) lvd[n-2]=1;
for (int i=n-2; i>/*=*/0; i--)
{
if (b[i]<dp[0]) dp[0]=b[i];
else if (b[i]>dp[cnt-1]) dp[cnt++]=b[i];
else
{
auto gde=prviveci(cnt, b[i]);
if (gde==0 || dp[gde-1]!=b[i])
{
auto gde=prviveci(cnt, b[i]);
dp[gde]=b[i];
}
}
int kolko=a[i-1]-x;
//cout<<i-1<<" "<<maxx-kolko<<" "<<cnt<<endl;
lvd[i-1]=binarna(cnt, maxx-kolko)+1;
}
//for (int i=0; i<n; i++) cout<<lvd[i]<<" ";
//cout<<endl;
a[0]-=x;
dp[0]=a[0];
ress=max(ress, lvd[0]+1);
cnt=1;
for (int i=1; i<n; i++)
{
a[i]-=x;
if (a[i]<dp[0]) dp[0]=a[i];
else if (a[i]>dp[cnt-1]) dp[cnt++]=a[i];
else
{
auto gde=prviveci(cnt, a[i]);
if (gde==0 || dp[gde-1]!=a[i])
{
auto gde=prviveci(cnt, a[i]);
dp[gde]=a[i];
}
}
int kolko=binarna(cnt, a[i]);
kolko++;
ress=max(ress, (kolko+lvd[i]+1));
}
ress=max(ress, cnt);
cout<<ress;
}
/*
15
20
1 7 3 20 8 3 17 10 3 27 14 17 13 9 15
5
10
1 4 2 7 10
5
1
1 4 2 7 10
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
332 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
0 ms |
328 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
332 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
0 ms |
328 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
332 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
0 ms |
328 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
19 |
Correct |
1 ms |
332 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
328 KB |
Output is correct |
23 |
Correct |
0 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
0 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
328 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
57 ms |
3268 KB |
Output is correct |
2 |
Correct |
73 ms |
3296 KB |
Output is correct |
3 |
Correct |
60 ms |
3176 KB |
Output is correct |
4 |
Correct |
56 ms |
3224 KB |
Output is correct |
5 |
Correct |
33 ms |
3612 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
13 ms |
1344 KB |
Output is correct |
2 |
Correct |
13 ms |
1356 KB |
Output is correct |
3 |
Correct |
12 ms |
1340 KB |
Output is correct |
4 |
Correct |
7 ms |
1208 KB |
Output is correct |
5 |
Correct |
0 ms |
332 KB |
Output is correct |
6 |
Correct |
7 ms |
1228 KB |
Output is correct |
7 |
Correct |
11 ms |
1348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
25 ms |
2116 KB |
Output is correct |
2 |
Correct |
26 ms |
2124 KB |
Output is correct |
3 |
Correct |
52 ms |
3288 KB |
Output is correct |
4 |
Correct |
31 ms |
3564 KB |
Output is correct |
5 |
Correct |
13 ms |
2188 KB |
Output is correct |
6 |
Correct |
21 ms |
3472 KB |
Output is correct |
7 |
Correct |
26 ms |
3504 KB |
Output is correct |
8 |
Correct |
20 ms |
2188 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
332 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
0 ms |
328 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
19 |
Correct |
1 ms |
332 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
328 KB |
Output is correct |
23 |
Correct |
0 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
0 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
328 KB |
Output is correct |
27 |
Correct |
57 ms |
3268 KB |
Output is correct |
28 |
Correct |
73 ms |
3296 KB |
Output is correct |
29 |
Correct |
60 ms |
3176 KB |
Output is correct |
30 |
Correct |
56 ms |
3224 KB |
Output is correct |
31 |
Correct |
33 ms |
3612 KB |
Output is correct |
32 |
Correct |
13 ms |
1344 KB |
Output is correct |
33 |
Correct |
13 ms |
1356 KB |
Output is correct |
34 |
Correct |
12 ms |
1340 KB |
Output is correct |
35 |
Correct |
7 ms |
1208 KB |
Output is correct |
36 |
Correct |
0 ms |
332 KB |
Output is correct |
37 |
Correct |
7 ms |
1228 KB |
Output is correct |
38 |
Correct |
11 ms |
1348 KB |
Output is correct |
39 |
Correct |
25 ms |
2116 KB |
Output is correct |
40 |
Correct |
26 ms |
2124 KB |
Output is correct |
41 |
Correct |
52 ms |
3288 KB |
Output is correct |
42 |
Correct |
31 ms |
3564 KB |
Output is correct |
43 |
Correct |
13 ms |
2188 KB |
Output is correct |
44 |
Correct |
21 ms |
3472 KB |
Output is correct |
45 |
Correct |
26 ms |
3504 KB |
Output is correct |
46 |
Correct |
20 ms |
2188 KB |
Output is correct |
47 |
Correct |
27 ms |
1988 KB |
Output is correct |
48 |
Correct |
29 ms |
2088 KB |
Output is correct |
49 |
Correct |
59 ms |
3140 KB |
Output is correct |
50 |
Correct |
29 ms |
3568 KB |
Output is correct |
51 |
Correct |
25 ms |
2976 KB |
Output is correct |
52 |
Correct |
30 ms |
3524 KB |
Output is correct |
53 |
Correct |
24 ms |
4280 KB |
Output is correct |
54 |
Correct |
26 ms |
4972 KB |
Output is correct |
55 |
Correct |
45 ms |
4608 KB |
Output is correct |