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Submission #1065986

# Submission time Handle Problem Language Result Execution time Memory
1065986 2024-08-19T13:52:30 Z manhlinh1501 Bigger segments (IZhO19_segments) C++17
27 / 100
 1500 ms 35828 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 j = 1; j <= i; j++) {
                int z = 1;
                for(; z <= j; z++) {
                    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 17 ms 35676 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 14 ms 35672 KB Output is correct
4 Correct 18 ms 35676 KB Output is correct
5 Correct 17 ms 35676 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35676 KB Output is correct
8 Correct 13 ms 35672 KB Output is correct
9 Correct 13 ms 35676 KB Output is correct
10 Correct 13 ms 35676 KB Output is correct
11 Correct 12 ms 35608 KB Output is correct
12 Correct 15 ms 35676 KB Output is correct
13 Correct 13 ms 35672 KB Output is correct
14 Correct 13 ms 35676 KB Output is correct
15 Correct 13 ms 35796 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 35676 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 14 ms 35672 KB Output is correct
4 Correct 18 ms 35676 KB Output is correct
5 Correct 17 ms 35676 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35676 KB Output is correct
8 Correct 13 ms 35672 KB Output is correct
9 Correct 13 ms 35676 KB Output is correct
10 Correct 13 ms 35676 KB Output is correct
11 Correct 12 ms 35608 KB Output is correct
12 Correct 15 ms 35676 KB Output is correct
13 Correct 13 ms 35672 KB Output is correct
14 Correct 13 ms 35676 KB Output is correct
15 Correct 13 ms 35796 KB Output is correct
16 Correct 34 ms 35676 KB Output is correct
17 Correct 32 ms 35672 KB Output is correct
18 Correct 32 ms 35676 KB Output is correct
19 Correct 31 ms 35828 KB Output is correct
20 Correct 58 ms 35676 KB Output is correct
21 Correct 32 ms 35676 KB Output is correct
22 Correct 24 ms 35672 KB Output is correct
23 Correct 18 ms 35676 KB Output is correct
24 Correct 54 ms 35744 KB Output is correct
25 Correct 34 ms 35808 KB Output is correct
26 Correct 34 ms 35824 KB Output is correct
27 Correct 32 ms 35676 KB Output is correct
28 Correct 52 ms 35676 KB Output is correct
29 Correct 33 ms 35672 KB Output is correct
30 Correct 32 ms 35676 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 35676 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 14 ms 35672 KB Output is correct
4 Correct 18 ms 35676 KB Output is correct
5 Correct 17 ms 35676 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35676 KB Output is correct
8 Correct 13 ms 35672 KB Output is correct
9 Correct 13 ms 35676 KB Output is correct
10 Correct 13 ms 35676 KB Output is correct
11 Correct 12 ms 35608 KB Output is correct
12 Correct 15 ms 35676 KB Output is correct
13 Correct 13 ms 35672 KB Output is correct
14 Correct 13 ms 35676 KB Output is correct
15 Correct 13 ms 35796 KB Output is correct
16 Correct 34 ms 35676 KB Output is correct
17 Correct 32 ms 35672 KB Output is correct
18 Correct 32 ms 35676 KB Output is correct
19 Correct 31 ms 35828 KB Output is correct
20 Correct 58 ms 35676 KB Output is correct
21 Correct 32 ms 35676 KB Output is correct
22 Correct 24 ms 35672 KB Output is correct
23 Correct 18 ms 35676 KB Output is correct
24 Correct 54 ms 35744 KB Output is correct
25 Correct 34 ms 35808 KB Output is correct
26 Correct 34 ms 35824 KB Output is correct
27 Correct 32 ms 35676 KB Output is correct
28 Correct 52 ms 35676 KB Output is correct
29 Correct 33 ms 35672 KB Output is correct
30 Correct 32 ms 35676 KB Output is correct
31 Execution timed out 1526 ms 35672 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 35676 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 14 ms 35672 KB Output is correct
4 Correct 18 ms 35676 KB Output is correct
5 Correct 17 ms 35676 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35676 KB Output is correct
8 Correct 13 ms 35672 KB Output is correct
9 Correct 13 ms 35676 KB Output is correct
10 Correct 13 ms 35676 KB Output is correct
11 Correct 12 ms 35608 KB Output is correct
12 Correct 15 ms 35676 KB Output is correct
13 Correct 13 ms 35672 KB Output is correct
14 Correct 13 ms 35676 KB Output is correct
15 Correct 13 ms 35796 KB Output is correct
16 Correct 34 ms 35676 KB Output is correct
17 Correct 32 ms 35672 KB Output is correct
18 Correct 32 ms 35676 KB Output is correct
19 Correct 31 ms 35828 KB Output is correct
20 Correct 58 ms 35676 KB Output is correct
21 Correct 32 ms 35676 KB Output is correct
22 Correct 24 ms 35672 KB Output is correct
23 Correct 18 ms 35676 KB Output is correct
24 Correct 54 ms 35744 KB Output is correct
25 Correct 34 ms 35808 KB Output is correct
26 Correct 34 ms 35824 KB Output is correct
27 Correct 32 ms 35676 KB Output is correct
28 Correct 52 ms 35676 KB Output is correct
29 Correct 33 ms 35672 KB Output is correct
30 Correct 32 ms 35676 KB Output is correct
31 Execution timed out 1526 ms 35672 KB Time limit exceeded
32 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 35676 KB Output is correct
2 Correct 13 ms 35676 KB Output is correct
3 Correct 14 ms 35672 KB Output is correct
4 Correct 18 ms 35676 KB Output is correct
5 Correct 17 ms 35676 KB Output is correct
6 Correct 13 ms 35676 KB Output is correct
7 Correct 13 ms 35676 KB Output is correct
8 Correct 13 ms 35672 KB Output is correct
9 Correct 13 ms 35676 KB Output is correct
10 Correct 13 ms 35676 KB Output is correct
11 Correct 12 ms 35608 KB Output is correct
12 Correct 15 ms 35676 KB Output is correct
13 Correct 13 ms 35672 KB Output is correct
14 Correct 13 ms 35676 KB Output is correct
15 Correct 13 ms 35796 KB Output is correct
16 Correct 34 ms 35676 KB Output is correct
17 Correct 32 ms 35672 KB Output is correct
18 Correct 32 ms 35676 KB Output is correct
19 Correct 31 ms 35828 KB Output is correct
20 Correct 58 ms 35676 KB Output is correct
21 Correct 32 ms 35676 KB Output is correct
22 Correct 24 ms 35672 KB Output is correct
23 Correct 18 ms 35676 KB Output is correct
24 Correct 54 ms 35744 KB Output is correct
25 Correct 34 ms 35808 KB Output is correct
26 Correct 34 ms 35824 KB Output is correct
27 Correct 32 ms 35676 KB Output is correct
28 Correct 52 ms 35676 KB Output is correct
29 Correct 33 ms 35672 KB Output is correct
30 Correct 32 ms 35676 KB Output is correct
31 Execution timed out 1526 ms 35672 KB Time limit exceeded
32 Halted 0 ms 0 KB -