oj.uz

Submission #890659

# Submission time Handle Problem Language Result Execution time Memory
890659 2023-12-21T18:12:48 Z arbuzick Let's Win the Election (JOI22_ho_t3) C++17
56 / 100
 2500 ms 936820 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>

using namespace std;

constexpr int maxn = 501, inf = 1e9 + 7;

constexpr double eps = 1e-4;

double dp[maxn][maxn][maxn];

double get_ans(int n, int k, vector<double> &a, vector<pair<double, int>> &s_b, int cnt_all) {
    for (int i = 0; i <= n; ++i) {
        for (int cnt_nw = 0; cnt_nw <= i && cnt_nw <= cnt_all; ++cnt_nw) {
            for (int cnt_used = 0; cnt_used <= k; ++cnt_used) {
                dp[i][cnt_nw][cnt_used] = inf;
            }
        }
    }
    dp[0][0][0] = 0;
    double ans = inf;
    for (int i = 0; i < n; ++i) {
        for (int cnt_nw = 0; cnt_nw <= i && cnt_nw <= cnt_all; ++cnt_nw) {
            for (int cnt_used = 0; cnt_used < k; ++cnt_used) {
                if (s_b[i].first < 10000 && cnt_nw < cnt_all) {
                    dp[i + 1][cnt_nw + 1][cnt_used + 1] = min(dp[i + 1][cnt_nw + 1][cnt_used + 1], dp[i][cnt_nw][cnt_used] + s_b[i].first / (cnt_nw + 1));
                    if (cnt_used + 1 == k && cnt_nw + 1 == cnt_all) {
                        ans = min(ans, dp[i + 1][cnt_nw + 1][cnt_used + 1]);
                    }
                }
                dp[i + 1][cnt_nw][cnt_used + 1] = min(dp[i + 1][cnt_nw][cnt_used + 1], dp[i][cnt_nw][cnt_used] + a[s_b[i].second] / (cnt_all + 1));
                if (cnt_used + 1 == k && cnt_nw == cnt_all) {
                    ans = min(ans, dp[i + 1][cnt_nw][cnt_used + 1]);
                }
                dp[i + 1][cnt_nw][cnt_used] = min(dp[i + 1][cnt_nw][cnt_used], dp[i][cnt_nw][cnt_used]);
            }
        }
    }
    return ans;
}

void solve() {
    int n, k;
    cin >> n >> k;
    vector<double> a(n), b(n);
    vector<pair<double, int>> s_b;
    for (int i = 0; i < n; ++i) {
        cin >> a[i] >> b[i];
        if (b[i] > 0) {
            s_b.emplace_back(b[i], i);
        } else {
            s_b.emplace_back(inf, i);
        }
    }
    sort(s_b.begin(), s_b.end());
    double ans = get_ans(n, k, a, s_b, 0);
    int l = 0, r = k;
    while (l < r - 3) {
        int m1 = l + (r - l) / 3;
        int m2 = r - (r - l) / 3;
        double ans1 = get_ans(n, k, a, s_b, m1);
        double ans2 = get_ans(n, k, a, s_b, m2);
        ans = min(ans, min(ans1, ans2));
        if (ans1 >= ans2) {
            l = m1;
        } else {
            r = m2;
        }
    }
    for (int i = l + 1; i < r; ++i) {
        ans = min(ans, get_ans(n, k, a, s_b, i));
    }
    cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.precision(25);
    cout << fixed;
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 254 ms 788052 KB Output is correct
6 Correct 747 ms 820712 KB Output is correct
7 Correct 2228 ms 874944 KB Output is correct
8 Execution timed out 2514 ms 928368 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 254 ms 788052 KB Output is correct
6 Correct 747 ms 820712 KB Output is correct
7 Correct 2228 ms 874944 KB Output is correct
8 Execution timed out 2514 ms 928368 KB Time limit exceeded
9 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14680 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14680 KB Output is correct
12 Correct 2 ms 14680 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 1 ms 10588 KB Output is correct
15 Correct 2 ms 14680 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14680 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14680 KB Output is correct
12 Correct 2 ms 14680 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 1 ms 10588 KB Output is correct
15 Correct 2 ms 14680 KB Output is correct
16 Correct 4 ms 41308 KB Output is correct
17 Correct 4 ms 41308 KB Output is correct
18 Correct 4 ms 41308 KB Output is correct
19 Correct 5 ms 41308 KB Output is correct
20 Correct 5 ms 41308 KB Output is correct
21 Correct 5 ms 41304 KB Output is correct
22 Correct 5 ms 41308 KB Output is correct
23 Correct 4 ms 41308 KB Output is correct
24 Correct 5 ms 41308 KB Output is correct
25 Correct 5 ms 41308 KB Output is correct
26 Correct 5 ms 41304 KB Output is correct
27 Correct 4 ms 41308 KB Output is correct
28 Correct 5 ms 41396 KB Output is correct
29 Correct 4 ms 41308 KB Output is correct
30 Correct 5 ms 41308 KB Output is correct
31 Correct 5 ms 41308 KB Output is correct
32 Correct 4 ms 41308 KB Output is correct
33 Correct 5 ms 41308 KB Output is correct
34 Correct 4 ms 41308 KB Output is correct
35 Correct 4 ms 41308 KB Output is correct
36 Correct 4 ms 41472 KB Output is correct
37 Correct 4 ms 41308 KB Output is correct
38 Correct 4 ms 41308 KB Output is correct
39 Correct 4 ms 41304 KB Output is correct
40 Correct 4 ms 41308 KB Output is correct

Subtask #5
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14680 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14680 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14680 KB Output is correct
12 Correct 2 ms 14680 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 1 ms 10588 KB Output is correct
15 Correct 2 ms 14680 KB Output is correct
16 Correct 4 ms 41308 KB Output is correct
17 Correct 4 ms 41308 KB Output is correct
18 Correct 4 ms 41308 KB Output is correct
19 Correct 5 ms 41308 KB Output is correct
20 Correct 5 ms 41308 KB Output is correct
21 Correct 5 ms 41304 KB Output is correct
22 Correct 5 ms 41308 KB Output is correct
23 Correct 4 ms 41308 KB Output is correct
24 Correct 5 ms 41308 KB Output is correct
25 Correct 5 ms 41308 KB Output is correct
26 Correct 5 ms 41304 KB Output is correct
27 Correct 4 ms 41308 KB Output is correct
28 Correct 5 ms 41396 KB Output is correct
29 Correct 4 ms 41308 KB Output is correct
30 Correct 5 ms 41308 KB Output is correct
31 Correct 5 ms 41308 KB Output is correct
32 Correct 4 ms 41308 KB Output is correct
33 Correct 5 ms 41308 KB Output is correct
34 Correct 4 ms 41308 KB Output is correct
35 Correct 4 ms 41308 KB Output is correct
36 Correct 4 ms 41472 KB Output is correct
37 Correct 4 ms 41308 KB Output is correct
38 Correct 4 ms 41308 KB Output is correct
39 Correct 4 ms 41304 KB Output is correct
40 Correct 4 ms 41308 KB Output is correct
41 Correct 20 ms 197388 KB Output is correct
42 Correct 20 ms 197516 KB Output is correct
43 Correct 22 ms 197212 KB Output is correct
44 Correct 23 ms 197212 KB Output is correct
45 Correct 30 ms 197212 KB Output is correct
46 Correct 25 ms 197468 KB Output is correct
47 Correct 31 ms 197200 KB Output is correct
48 Correct 37 ms 197376 KB Output is correct
49 Correct 50 ms 197432 KB Output is correct
50 Correct 41 ms 197200 KB Output is correct
51 Correct 51 ms 197212 KB Output is correct
52 Correct 55 ms 197436 KB Output is correct
53 Correct 27 ms 197204 KB Output is correct
54 Correct 32 ms 197212 KB Output is correct
55 Correct 38 ms 197212 KB Output is correct
56 Correct 29 ms 197212 KB Output is correct
57 Correct 35 ms 197212 KB Output is correct
58 Correct 38 ms 197212 KB Output is correct
59 Correct 39 ms 197212 KB Output is correct
60 Correct 36 ms 197268 KB Output is correct

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2551 ms 936820 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 254 ms 788052 KB Output is correct
6 Correct 747 ms 820712 KB Output is correct
7 Correct 2228 ms 874944 KB Output is correct
8 Execution timed out 2514 ms 928368 KB Time limit exceeded
9 Halted 0 ms 0 KB -