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Submission #916355

# Submission time Handle Problem Language Result Execution time Memory
916355 2024-01-25T17:56:20 Z KactusJack Global Warming (CEOI18_glo) C++14
100 / 100
 51 ms 5204 KB 
#include<bits/stdc++.h>
#define ll long long
#define F first
#define S second
using namespace std;
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, x;
    cin >> n >> x;
    vector<int> a(n);
    for(int i = 0; i < n; i++){
        cin >> a[i];
    }
    vector<int> prefix(n), suffix(n), dp;
    int j;
    for(int i = 0; i < n; i++){
        j = lower_bound(dp.begin(), dp.end(), a[i]) - dp.begin();
        prefix[i] = j+1;
        a[i] -= x;
        j = lower_bound(dp.begin(), dp.end(), a[i]) - dp.begin();
        if(j == dp.size()){
            dp.push_back(a[i]);
        }
        else{
            dp[j] = a[i];
        }
    }
    for(int i = 0; i < n; i++){
        a[i] *= -1;
    }
    dp.clear();
    for(int i = n-1; i >= 0; i--){
        a[i] -= x;
        j = lower_bound(dp.begin(), dp.end(), a[i]) - dp.begin();
        if(j == dp.size()){
            dp.push_back(a[i]);
        }
        else{
            dp[j] = a[i];
        }
        suffix[i] = j+1;
    }
    int ans = 0;
    for(int i = 0; i < n; i++){
        ans = max(ans, prefix[i] + suffix[i] - 1);
    }
    cout << ans << '\n';
    return 0;
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if(j == dp.size()){
      |            ~~^~~~~~~~~~~~
glo.cpp:37:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         if(j == dp.size()){
      |            ~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 2652 KB Output is correct
2 Correct 46 ms 4736 KB Output is correct
3 Correct 48 ms 4696 KB Output is correct
4 Correct 51 ms 4564 KB Output is correct
5 Correct 22 ms 4452 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 856 KB Output is correct
2 Correct 11 ms 1372 KB Output is correct
3 Correct 11 ms 1368 KB Output is correct
4 Correct 6 ms 1372 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1448 KB Output is correct
7 Correct 9 ms 1628 KB Output is correct

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 1624 KB Output is correct
2 Correct 19 ms 2396 KB Output is correct
3 Correct 44 ms 4696 KB Output is correct
4 Correct 23 ms 4576 KB Output is correct
5 Correct 12 ms 2528 KB Output is correct
6 Correct 26 ms 4528 KB Output is correct
7 Correct 23 ms 5088 KB Output is correct
8 Correct 15 ms 2632 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 46 ms 2652 KB Output is correct
28 Correct 46 ms 4736 KB Output is correct
29 Correct 48 ms 4696 KB Output is correct
30 Correct 51 ms 4564 KB Output is correct
31 Correct 22 ms 4452 KB Output is correct
32 Correct 10 ms 856 KB Output is correct
33 Correct 11 ms 1372 KB Output is correct
34 Correct 11 ms 1368 KB Output is correct
35 Correct 6 ms 1372 KB Output is correct
36 Correct 1 ms 348 KB Output is correct
37 Correct 6 ms 1448 KB Output is correct
38 Correct 9 ms 1628 KB Output is correct
39 Correct 19 ms 1624 KB Output is correct
40 Correct 19 ms 2396 KB Output is correct
41 Correct 44 ms 4696 KB Output is correct
42 Correct 23 ms 4576 KB Output is correct
43 Correct 12 ms 2528 KB Output is correct
44 Correct 26 ms 4528 KB Output is correct
45 Correct 23 ms 5088 KB Output is correct
46 Correct 15 ms 2632 KB Output is correct
47 Correct 23 ms 2508 KB Output is correct
48 Correct 22 ms 2396 KB Output is correct
49 Correct 45 ms 4680 KB Output is correct
50 Correct 22 ms 4572 KB Output is correct
51 Correct 21 ms 3552 KB Output is correct
52 Correct 22 ms 4592 KB Output is correct
53 Correct 21 ms 4576 KB Output is correct
54 Correct 23 ms 5204 KB Output is correct
55 Correct 35 ms 4692 KB Output is correct