oj.uz

Submission #1066004

# Submission time Handle Problem Language Result Execution time Memory
1066004 2024-08-19T14:02:26 Z manhlinh1501 Bigger segments (IZhO19_segments) C++17
27 / 100
 1500 ms 35820 KB 
#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
const int MAXN = 5e5 + 5;

int N;
int a[MAXN];

namespace subtask {
    const int MAXN = 3e3 + 5;

    int dp[MAXN][MAXN];
    i64 prefix[MAXN];

    void solution() {
        for(int i = 1; i <= N; i++) prefix[i] = prefix[i - 1] + a[i];
        memset(dp, -0x3f, sizeof dp);
        for(int i = 1; i <= N; i++) dp[i][1] = 1;
        for(int i = 1; i <= N; i++) {
            for(int z = 1; z <= i; z++) {
                for(int j = 1; j <= i; j++) {
                    if(z <= j and j <= i) {
                        if(prefix[i] + prefix[z - 1] >= 2 * prefix[j - 1] and (i != j or j != z))
                            dp[i][j] = max(dp[i][j], dp[j - 1][z] + 1);
                    }
                }
            }
        }
        int ans = 0;
        for(int i = 1; i <= N; i++) ans = max(ans, dp[N][i]);
        cout << ans << "\n";
    }
}
signed main() {
#define TASK "code"

    if (fopen(TASK ".inp", "r")) {
        freopen(TASK ".inp", "r", stdin);
        freopen(TASK ".out", "w", stdout);
    }

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> N;
    for(int i = 1; i <= N; i++) cin >> a[i];
    subtask::solution();
    return (0 ^ 0);
}

/**
4
2 3 1 7
**/

/**
5
6 2 3 9 13
**/

/**
3
3 1 2
**/

Compilation message

segments.cpp: In function 'int main()':
segments.cpp:38:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         freopen(TASK ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen(TASK ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 35672 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 20 ms 35672 KB Output is correct
4 Correct 12 ms 35672 KB Output is correct
5 Correct 12 ms 35804 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35780 KB Output is correct
8 Correct 14 ms 35676 KB Output is correct
9 Correct 12 ms 35676 KB Output is correct
10 Correct 19 ms 35572 KB Output is correct
11 Correct 12 ms 35660 KB Output is correct
12 Correct 14 ms 35676 KB Output is correct
13 Correct 12 ms 35580 KB Output is correct
14 Correct 16 ms 35748 KB Output is correct
15 Correct 12 ms 35676 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 35672 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 20 ms 35672 KB Output is correct
4 Correct 12 ms 35672 KB Output is correct
5 Correct 12 ms 35804 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35780 KB Output is correct
8 Correct 14 ms 35676 KB Output is correct
9 Correct 12 ms 35676 KB Output is correct
10 Correct 19 ms 35572 KB Output is correct
11 Correct 12 ms 35660 KB Output is correct
12 Correct 14 ms 35676 KB Output is correct
13 Correct 12 ms 35580 KB Output is correct
14 Correct 16 ms 35748 KB Output is correct
15 Correct 12 ms 35676 KB Output is correct
16 Correct 50 ms 35672 KB Output is correct
17 Correct 49 ms 35672 KB Output is correct
18 Correct 51 ms 35672 KB Output is correct
19 Correct 84 ms 35676 KB Output is correct
20 Correct 56 ms 35676 KB Output is correct
21 Correct 54 ms 35676 KB Output is correct
22 Correct 34 ms 35820 KB Output is correct
23 Correct 23 ms 35672 KB Output is correct
24 Correct 61 ms 35676 KB Output is correct
25 Correct 59 ms 35676 KB Output is correct
26 Correct 64 ms 35676 KB Output is correct
27 Correct 49 ms 35584 KB Output is correct
28 Correct 60 ms 35756 KB Output is correct
29 Correct 55 ms 35676 KB Output is correct
30 Correct 67 ms 35676 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 35672 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 20 ms 35672 KB Output is correct
4 Correct 12 ms 35672 KB Output is correct
5 Correct 12 ms 35804 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35780 KB Output is correct
8 Correct 14 ms 35676 KB Output is correct
9 Correct 12 ms 35676 KB Output is correct
10 Correct 19 ms 35572 KB Output is correct
11 Correct 12 ms 35660 KB Output is correct
12 Correct 14 ms 35676 KB Output is correct
13 Correct 12 ms 35580 KB Output is correct
14 Correct 16 ms 35748 KB Output is correct
15 Correct 12 ms 35676 KB Output is correct
16 Correct 50 ms 35672 KB Output is correct
17 Correct 49 ms 35672 KB Output is correct
18 Correct 51 ms 35672 KB Output is correct
19 Correct 84 ms 35676 KB Output is correct
20 Correct 56 ms 35676 KB Output is correct
21 Correct 54 ms 35676 KB Output is correct
22 Correct 34 ms 35820 KB Output is correct
23 Correct 23 ms 35672 KB Output is correct
24 Correct 61 ms 35676 KB Output is correct
25 Correct 59 ms 35676 KB Output is correct
26 Correct 64 ms 35676 KB Output is correct
27 Correct 49 ms 35584 KB Output is correct
28 Correct 60 ms 35756 KB Output is correct
29 Correct 55 ms 35676 KB Output is correct
30 Correct 67 ms 35676 KB Output is correct
31 Execution timed out 1524 ms 35680 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 35672 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 20 ms 35672 KB Output is correct
4 Correct 12 ms 35672 KB Output is correct
5 Correct 12 ms 35804 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35780 KB Output is correct
8 Correct 14 ms 35676 KB Output is correct
9 Correct 12 ms 35676 KB Output is correct
10 Correct 19 ms 35572 KB Output is correct
11 Correct 12 ms 35660 KB Output is correct
12 Correct 14 ms 35676 KB Output is correct
13 Correct 12 ms 35580 KB Output is correct
14 Correct 16 ms 35748 KB Output is correct
15 Correct 12 ms 35676 KB Output is correct
16 Correct 50 ms 35672 KB Output is correct
17 Correct 49 ms 35672 KB Output is correct
18 Correct 51 ms 35672 KB Output is correct
19 Correct 84 ms 35676 KB Output is correct
20 Correct 56 ms 35676 KB Output is correct
21 Correct 54 ms 35676 KB Output is correct
22 Correct 34 ms 35820 KB Output is correct
23 Correct 23 ms 35672 KB Output is correct
24 Correct 61 ms 35676 KB Output is correct
25 Correct 59 ms 35676 KB Output is correct
26 Correct 64 ms 35676 KB Output is correct
27 Correct 49 ms 35584 KB Output is correct
28 Correct 60 ms 35756 KB Output is correct
29 Correct 55 ms 35676 KB Output is correct
30 Correct 67 ms 35676 KB Output is correct
31 Execution timed out 1524 ms 35680 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 35672 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 20 ms 35672 KB Output is correct
4 Correct 12 ms 35672 KB Output is correct
5 Correct 12 ms 35804 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35780 KB Output is correct
8 Correct 14 ms 35676 KB Output is correct
9 Correct 12 ms 35676 KB Output is correct
10 Correct 19 ms 35572 KB Output is correct
11 Correct 12 ms 35660 KB Output is correct
12 Correct 14 ms 35676 KB Output is correct
13 Correct 12 ms 35580 KB Output is correct
14 Correct 16 ms 35748 KB Output is correct
15 Correct 12 ms 35676 KB Output is correct
16 Correct 50 ms 35672 KB Output is correct
17 Correct 49 ms 35672 KB Output is correct
18 Correct 51 ms 35672 KB Output is correct
19 Correct 84 ms 35676 KB Output is correct
20 Correct 56 ms 35676 KB Output is correct
21 Correct 54 ms 35676 KB Output is correct
22 Correct 34 ms 35820 KB Output is correct
23 Correct 23 ms 35672 KB Output is correct
24 Correct 61 ms 35676 KB Output is correct
25 Correct 59 ms 35676 KB Output is correct
26 Correct 64 ms 35676 KB Output is correct
27 Correct 49 ms 35584 KB Output is correct
28 Correct 60 ms 35756 KB Output is correct
29 Correct 55 ms 35676 KB Output is correct
30 Correct 67 ms 35676 KB Output is correct
31 Execution timed out 1524 ms 35680 KB Time limit exceeded
32 Halted 0 ms 0 KB -