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Submission #1111161

# Submission time Handle Problem Language Result Execution time Memory
1111161 2024-11-11T15:32:03 Z Ghulam_Junaid Global Warming (CEOI18_glo) C++17
100 / 100
 87 ms 5448 KB 
#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};
      |         ^~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory 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

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory 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

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory 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

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory 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

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory 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

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory 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

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory 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