oj.uz

Submission #955808

# Submission time Handle Problem Language Result Execution time Memory
955808 2024-03-31T12:42:35 Z vjudge1 Sparklers (JOI17_sparklers) C++17
50 / 100
 150 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    ll n, k, t, i, j, a, lo = 1, hi = (1 << 30), s;
    cin >> n >> k >> t;
    k--;
    vector<ll> v(n);
    for (i = 0; i < n; i++)
        cin >> v[i];
    if (!v[n - 1])
    {
        cout << 0;
        return 0;
    }
    vector<vector<bool> > dp(n);
    queue<vector<ll> > q;
    for (i = 0; i < n; i++)
        dp[i].resize(i + 1);
    while (hi - lo > 1)
    {
        s = (hi + lo) / 2;
        for (i = 0; i < n; i++)
        {
            for (j = 0; j <= i; j++)
                dp[i][j] = 0;
        }
        dp[k][k] = 1;
        q.push({k, k});
        while (!q.empty())
        {
            i = q.front()[0];
            j = q.front()[1];
            q.pop();
            a = 2 * t * s * (i - j + 1);
            if (j && !dp[i][j - 1] && v[i] - v[j - 1] <= a)
            {
                dp[i][j - 1] = 1;
                q.push({i, j - 1});
            }
            if (i < n - 1 && !dp[i + 1][j] && v[i + 1] - v[j] <= a)
            {
                dp[i + 1][j] = 1;
                q.push({i + 1, j});
            }
        }
        if (dp[n - 1][0])
            hi = s;
        else
            lo = s;
    }
    cout << hi;
    return 0;
}

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 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 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 600 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 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 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 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 600 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 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 64 ms 348 KB Output is correct
23 Correct 40 ms 348 KB Output is correct
24 Correct 25 ms 348 KB Output is correct
25 Correct 29 ms 348 KB Output is correct
26 Correct 80 ms 348 KB Output is correct
27 Correct 79 ms 568 KB Output is correct
28 Correct 111 ms 580 KB Output is correct
29 Correct 134 ms 344 KB Output is correct
30 Correct 91 ms 600 KB Output is correct
31 Correct 91 ms 344 KB Output is correct
32 Correct 116 ms 604 KB Output is correct
33 Correct 150 ms 600 KB Output is correct
34 Correct 72 ms 348 KB Output is correct
35 Correct 130 ms 344 KB Output is correct
36 Correct 59 ms 560 KB Output is correct
37 Correct 56 ms 348 KB Output is correct
38 Correct 97 ms 344 KB Output is correct
39 Correct 47 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 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 1 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 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 600 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 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 64 ms 348 KB Output is correct
23 Correct 40 ms 348 KB Output is correct
24 Correct 25 ms 348 KB Output is correct
25 Correct 29 ms 348 KB Output is correct
26 Correct 80 ms 348 KB Output is correct
27 Correct 79 ms 568 KB Output is correct
28 Correct 111 ms 580 KB Output is correct
29 Correct 134 ms 344 KB Output is correct
30 Correct 91 ms 600 KB Output is correct
31 Correct 91 ms 344 KB Output is correct
32 Correct 116 ms 604 KB Output is correct
33 Correct 150 ms 600 KB Output is correct
34 Correct 72 ms 348 KB Output is correct
35 Correct 130 ms 344 KB Output is correct
36 Correct 59 ms 560 KB Output is correct
37 Correct 56 ms 348 KB Output is correct
38 Correct 97 ms 344 KB Output is correct
39 Correct 47 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Runtime error 132 ms 262144 KB Execution killed with signal 9
42 Halted 0 ms 0 KB -