#include <bits/stdc++.h>
using namespace std;
const int inf = 2e9 + 10;
int main(){
int n, x;
cin >> n >> x;
int a[n];
for (int i=0; i<n; i++)
cin >> a[i];
int ans = 0;
int pref[n] = {0};
int suf[n] = {0};
int dp[n + 1];
for (int i = 1; i <= n; i ++)
dp[i] = inf;
dp[0] = -inf;
for (int i = n - 1; i >= 0; i --){
int lb = lower_bound(dp, dp + n + 1, -a[i]) - dp;
suf[i] = lb;
int ub = lower_bound(dp, dp + n + 1, -(a[i] + x)) - dp;
dp[ub] = -(a[i] + x);
}
for (int i = 1; i <= n; i ++)
dp[i] = inf;
dp[0] = -inf;
for (int i = 0; i < n; i ++){
int ub = lower_bound(dp, dp + n + 1, a[i]) - dp;
dp[ub] = a[i];
ans = max(ans, ub + suf[i] - 1);
}
cout << ans << endl;
}
Compilation message
glo.cpp: In function 'int main()':
glo.cpp:15:9: warning: unused variable 'pref' [-Wunused-variable]
15 | int pref[n] = {0};
| ^~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
436 KB |
Output is correct |
| 3 |
Correct |
1 ms |
336 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Correct |
1 ms |
336 KB |
Output is correct |
| 6 |
Correct |
1 ms |
336 KB |
Output is correct |
| 7 |
Correct |
1 ms |
336 KB |
Output is correct |
| 8 |
Correct |
1 ms |
336 KB |
Output is correct |
| 9 |
Correct |
1 ms |
336 KB |
Output is correct |
| 10 |
Correct |
1 ms |
336 KB |
Output is correct |
| 11 |
Correct |
1 ms |
440 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
436 KB |
Output is correct |
| 3 |
Correct |
1 ms |
336 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Correct |
1 ms |
336 KB |
Output is correct |
| 6 |
Correct |
1 ms |
336 KB |
Output is correct |
| 7 |
Correct |
1 ms |
336 KB |
Output is correct |
| 8 |
Correct |
1 ms |
336 KB |
Output is correct |
| 9 |
Correct |
1 ms |
336 KB |
Output is correct |
| 10 |
Correct |
1 ms |
336 KB |
Output is correct |
| 11 |
Correct |
1 ms |
440 KB |
Output is correct |
| 12 |
Correct |
1 ms |
336 KB |
Output is correct |
| 13 |
Correct |
1 ms |
504 KB |
Output is correct |
| 14 |
Correct |
1 ms |
336 KB |
Output is correct |
| 15 |
Correct |
1 ms |
336 KB |
Output is correct |
| 16 |
Correct |
1 ms |
336 KB |
Output is correct |
| 17 |
Correct |
1 ms |
336 KB |
Output is correct |
| 18 |
Correct |
1 ms |
336 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
436 KB |
Output is correct |
| 3 |
Correct |
1 ms |
336 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Correct |
1 ms |
336 KB |
Output is correct |
| 6 |
Correct |
1 ms |
336 KB |
Output is correct |
| 7 |
Correct |
1 ms |
336 KB |
Output is correct |
| 8 |
Correct |
1 ms |
336 KB |
Output is correct |
| 9 |
Correct |
1 ms |
336 KB |
Output is correct |
| 10 |
Correct |
1 ms |
336 KB |
Output is correct |
| 11 |
Correct |
1 ms |
440 KB |
Output is correct |
| 12 |
Correct |
1 ms |
336 KB |
Output is correct |
| 13 |
Correct |
1 ms |
504 KB |
Output is correct |
| 14 |
Correct |
1 ms |
336 KB |
Output is correct |
| 15 |
Correct |
1 ms |
336 KB |
Output is correct |
| 16 |
Correct |
1 ms |
336 KB |
Output is correct |
| 17 |
Correct |
1 ms |
336 KB |
Output is correct |
| 18 |
Correct |
1 ms |
336 KB |
Output is correct |
| 19 |
Correct |
1 ms |
336 KB |
Output is correct |
| 20 |
Correct |
1 ms |
336 KB |
Output is correct |
| 21 |
Correct |
1 ms |
336 KB |
Output is correct |
| 22 |
Correct |
1 ms |
336 KB |
Output is correct |
| 23 |
Correct |
1 ms |
336 KB |
Output is correct |
| 24 |
Correct |
1 ms |
336 KB |
Output is correct |
| 25 |
Correct |
1 ms |
500 KB |
Output is correct |
| 26 |
Correct |
1 ms |
336 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
82 ms |
5428 KB |
Output is correct |
| 2 |
Correct |
81 ms |
5292 KB |
Output is correct |
| 3 |
Correct |
84 ms |
5448 KB |
Output is correct |
| 4 |
Correct |
81 ms |
5448 KB |
Output is correct |
| 5 |
Correct |
56 ms |
4524 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
20 ms |
1616 KB |
Output is correct |
| 2 |
Correct |
19 ms |
1616 KB |
Output is correct |
| 3 |
Correct |
20 ms |
1620 KB |
Output is correct |
| 4 |
Correct |
14 ms |
1472 KB |
Output is correct |
| 5 |
Correct |
1 ms |
336 KB |
Output is correct |
| 6 |
Correct |
14 ms |
1360 KB |
Output is correct |
| 7 |
Correct |
18 ms |
1616 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
45 ms |
2800 KB |
Output is correct |
| 2 |
Correct |
35 ms |
2896 KB |
Output is correct |
| 3 |
Correct |
85 ms |
5416 KB |
Output is correct |
| 4 |
Correct |
53 ms |
4680 KB |
Output is correct |
| 5 |
Correct |
27 ms |
2552 KB |
Output is correct |
| 6 |
Correct |
52 ms |
4424 KB |
Output is correct |
| 7 |
Correct |
63 ms |
5244 KB |
Output is correct |
| 8 |
Correct |
40 ms |
2896 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
336 KB |
Output is correct |
| 2 |
Correct |
1 ms |
436 KB |
Output is correct |
| 3 |
Correct |
1 ms |
336 KB |
Output is correct |
| 4 |
Correct |
1 ms |
336 KB |
Output is correct |
| 5 |
Correct |
1 ms |
336 KB |
Output is correct |
| 6 |
Correct |
1 ms |
336 KB |
Output is correct |
| 7 |
Correct |
1 ms |
336 KB |
Output is correct |
| 8 |
Correct |
1 ms |
336 KB |
Output is correct |
| 9 |
Correct |
1 ms |
336 KB |
Output is correct |
| 10 |
Correct |
1 ms |
336 KB |
Output is correct |
| 11 |
Correct |
1 ms |
440 KB |
Output is correct |
| 12 |
Correct |
1 ms |
336 KB |
Output is correct |
| 13 |
Correct |
1 ms |
504 KB |
Output is correct |
| 14 |
Correct |
1 ms |
336 KB |
Output is correct |
| 15 |
Correct |
1 ms |
336 KB |
Output is correct |
| 16 |
Correct |
1 ms |
336 KB |
Output is correct |
| 17 |
Correct |
1 ms |
336 KB |
Output is correct |
| 18 |
Correct |
1 ms |
336 KB |
Output is correct |
| 19 |
Correct |
1 ms |
336 KB |
Output is correct |
| 20 |
Correct |
1 ms |
336 KB |
Output is correct |
| 21 |
Correct |
1 ms |
336 KB |
Output is correct |
| 22 |
Correct |
1 ms |
336 KB |
Output is correct |
| 23 |
Correct |
1 ms |
336 KB |
Output is correct |
| 24 |
Correct |
1 ms |
336 KB |
Output is correct |
| 25 |
Correct |
1 ms |
500 KB |
Output is correct |
| 26 |
Correct |
1 ms |
336 KB |
Output is correct |
| 27 |
Correct |
82 ms |
5428 KB |
Output is correct |
| 28 |
Correct |
81 ms |
5292 KB |
Output is correct |
| 29 |
Correct |
84 ms |
5448 KB |
Output is correct |
| 30 |
Correct |
81 ms |
5448 KB |
Output is correct |
| 31 |
Correct |
56 ms |
4524 KB |
Output is correct |
| 32 |
Correct |
20 ms |
1616 KB |
Output is correct |
| 33 |
Correct |
19 ms |
1616 KB |
Output is correct |
| 34 |
Correct |
20 ms |
1620 KB |
Output is correct |
| 35 |
Correct |
14 ms |
1472 KB |
Output is correct |
| 36 |
Correct |
1 ms |
336 KB |
Output is correct |
| 37 |
Correct |
14 ms |
1360 KB |
Output is correct |
| 38 |
Correct |
18 ms |
1616 KB |
Output is correct |
| 39 |
Correct |
45 ms |
2800 KB |
Output is correct |
| 40 |
Correct |
35 ms |
2896 KB |
Output is correct |
| 41 |
Correct |
85 ms |
5416 KB |
Output is correct |
| 42 |
Correct |
53 ms |
4680 KB |
Output is correct |
| 43 |
Correct |
27 ms |
2552 KB |
Output is correct |
| 44 |
Correct |
52 ms |
4424 KB |
Output is correct |
| 45 |
Correct |
63 ms |
5244 KB |
Output is correct |
| 46 |
Correct |
40 ms |
2896 KB |
Output is correct |
| 47 |
Correct |
38 ms |
2888 KB |
Output is correct |
| 48 |
Correct |
39 ms |
2888 KB |
Output is correct |
| 49 |
Correct |
77 ms |
5412 KB |
Output is correct |
| 50 |
Correct |
67 ms |
4648 KB |
Output is correct |
| 51 |
Correct |
43 ms |
3408 KB |
Output is correct |
| 52 |
Correct |
56 ms |
4780 KB |
Output is correct |
| 53 |
Correct |
52 ms |
4680 KB |
Output is correct |
| 54 |
Correct |
72 ms |
5284 KB |
Output is correct |
| 55 |
Correct |
87 ms |
5448 KB |
Output is correct |
