#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define int long long
#define F first
#define S second
const int N = 2e5+3;
int dp[N], ndp[N];
pair<int, int> mdp[N];
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, d;
cin >> n >> d;
int a[n];
for(int i=0; i< n; i++)cin >> a[i];
dp[0] = 2e9+1;
int mx=0;
for(int i = n-1; i>=0; i--){
if(a[i]<dp[mx]){
mx++;
dp[mx]=a[i];
}
else{
int l = 1, r = mx;
while(l<=r){
int s = l+r>>1;
if(dp[s]>=a[i])l=s+1;
else r=s-1;
}
if(dp[l-1]!=a[i])dp[l]=max(dp[l], a[i]);
}
mdp[i] = {mx, dp[mx]};
}
int ans=mx;
if(d==0){
cout << ans;
return 0;
}
for(int i = 1; i<=n; i++)ndp[i]=1e9+i;
ndp[0]=-1e9;
int mxx=0;
for(int i=0; i < n; i++){
int l = 0, r = n;
if(a[i]-d>ndp[mxx]){
mxx++;
ndp[mxx]=a[i]-d;
}
else{
while(l<=r){
int s = l+r>>1;
if(ndp[s]>=a[i]-d)r=s-1;
else l=s+1;
}
ndp[l]=min(ndp[l], a[i]-d);
}
l = 0, r = n;
while(l<=r){
int s = l+r>>1;
if(ndp[s]<mdp[i+1].S)l=s+1;
else r=s-1;
}
ans=max(ans, mdp[i+1].F+r);
}
cout << ans;
}
Compilation message
glo.cpp: In function 'int main()':
glo.cpp:32:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
32 | int s = l+r>>1;
| ~^~
glo.cpp:56:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
56 | int s = l+r>>1;
| ~^~
glo.cpp:64:22: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
64 | int s = l+r>>1;
| ~^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
2 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2392 KB |
Output is correct |
7 |
Correct |
1 ms |
2392 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
2 ms |
2512 KB |
Output is correct |
10 |
Correct |
1 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
2 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2392 KB |
Output is correct |
7 |
Correct |
1 ms |
2392 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
2 ms |
2512 KB |
Output is correct |
10 |
Correct |
1 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
1 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
2392 KB |
Output is correct |
15 |
Correct |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
2 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2392 KB |
Output is correct |
7 |
Correct |
1 ms |
2392 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
2 ms |
2512 KB |
Output is correct |
10 |
Correct |
1 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
1 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
2392 KB |
Output is correct |
15 |
Correct |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
19 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
20 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
26 ms |
6236 KB |
Output is correct |
2 |
Correct |
26 ms |
8028 KB |
Output is correct |
3 |
Correct |
26 ms |
8152 KB |
Output is correct |
4 |
Correct |
27 ms |
8020 KB |
Output is correct |
5 |
Correct |
14 ms |
8024 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
11 ms |
4956 KB |
Output is correct |
2 |
Correct |
10 ms |
5568 KB |
Output is correct |
3 |
Correct |
10 ms |
5468 KB |
Output is correct |
4 |
Correct |
6 ms |
5468 KB |
Output is correct |
5 |
Correct |
1 ms |
2396 KB |
Output is correct |
6 |
Correct |
8 ms |
5468 KB |
Output is correct |
7 |
Correct |
9 ms |
5468 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
20 ms |
5348 KB |
Output is correct |
2 |
Correct |
22 ms |
6744 KB |
Output is correct |
3 |
Correct |
41 ms |
8404 KB |
Output is correct |
4 |
Correct |
26 ms |
8540 KB |
Output is correct |
5 |
Correct |
15 ms |
6492 KB |
Output is correct |
6 |
Correct |
20 ms |
8504 KB |
Output is correct |
7 |
Correct |
27 ms |
9228 KB |
Output is correct |
8 |
Correct |
17 ms |
6512 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Correct |
1 ms |
2396 KB |
Output is correct |
3 |
Correct |
2 ms |
2396 KB |
Output is correct |
4 |
Correct |
1 ms |
2396 KB |
Output is correct |
5 |
Correct |
0 ms |
2396 KB |
Output is correct |
6 |
Correct |
1 ms |
2392 KB |
Output is correct |
7 |
Correct |
1 ms |
2392 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
2 ms |
2512 KB |
Output is correct |
10 |
Correct |
1 ms |
2396 KB |
Output is correct |
11 |
Correct |
0 ms |
2396 KB |
Output is correct |
12 |
Correct |
1 ms |
2396 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
1 ms |
2392 KB |
Output is correct |
15 |
Correct |
1 ms |
2396 KB |
Output is correct |
16 |
Correct |
1 ms |
2396 KB |
Output is correct |
17 |
Correct |
1 ms |
2396 KB |
Output is correct |
18 |
Correct |
1 ms |
2396 KB |
Output is correct |
19 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
20 |
Halted |
0 ms |
0 KB |
- |