oj.uz

답안 #890685

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
890685 2023-12-21T18:27:38 Z arbuzick Let's Win the Election (JOI22_ho_t3) C++17
61 / 100
 2500 ms 918788 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 ans_vl[maxn];

double get_ans(int n, int k, vector<double> &a, vector<pair<double, int>> &s_b, int cnt_all) {
    if (ans_vl[cnt_all] >= 0.5) {
        return ans_vl[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 = cnt_nw; 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]);
            }
        }
    }
    ans_vl[cnt_all] = ans;
    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);
    double vl = 0;
    int p_prv = 0;
    int l = 0, r = k;
    while (l < r - 1) {
        int m1, m2;
        double ans1, ans2;
        if (l == 0 && r == k) {
            int aa = l + (r - l) / 2.618;
            int bb = l + (r - l) - (aa - l);
            ans1 = get_ans(n, k, a, s_b, aa);
            ans2 = get_ans(n, k, a, s_b, bb);
            m1 = aa, m2 = bb;
        } else {
            int aa = l + (r - l) / 2.618;
            int bb = l + (r - l) - (aa - l);
            if (abs(aa - p_prv) < abs(bb - p_prv)) {
                aa = p_prv;
                ans1 = vl;
                ans2 = get_ans(n, k, a, s_b, bb);
            } else {
                bb = p_prv;
                ans2 = vl;
                ans1 = get_ans(n, k, a, s_b, aa);
            }
            m1 = aa, m2 = bb;
        }
        if (m1 == l || m2 == l || m1 == r || m2 == r) {
            break;
        }
        ans = min(ans, min(ans1, ans2));
        if (ans1 >= ans2) {
            l = m1;
            vl = ans2;
            p_prv = m2;
        } else {
            r = m2;
            vl = ans1;
            p_prv = m1;
        }
    }
    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
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6744 KB Output is correct
4 Correct 1 ms 8656 KB Output is correct
5 Correct 116 ms 655208 KB Output is correct
6 Correct 319 ms 708432 KB Output is correct
7 Correct 870 ms 800232 KB Output is correct
8 Correct 1402 ms 887248 KB Output is correct
9 Correct 1761 ms 918788 KB Output is correct
10 Correct 1295 ms 873588 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6744 KB Output is correct
4 Correct 1 ms 8656 KB Output is correct
5 Correct 116 ms 655208 KB Output is correct
6 Correct 319 ms 708432 KB Output is correct
7 Correct 870 ms 800232 KB Output is correct
8 Correct 1402 ms 887248 KB Output is correct
9 Correct 1761 ms 918788 KB Output is correct
10 Correct 1295 ms 873588 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 523 ms 729840 KB Output is correct
13 Correct 373 ms 705020 KB Output is correct
14 Correct 255 ms 692532 KB Output is correct
15 Correct 1711 ms 873112 KB Output is correct
16 Correct 1461 ms 817180 KB Output is correct
17 Incorrect 1413 ms 873552 KB Output isn't correct
18 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 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 3 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 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 14684 KB Output is correct

Subtask #4
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 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 3 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 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 14684 KB Output is correct
16 Correct 5 ms 41304 KB Output is correct
17 Correct 5 ms 41308 KB Output is correct
18 Correct 5 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 4 ms 41436 KB Output is correct
22 Correct 4 ms 41304 KB Output is correct
23 Correct 5 ms 41308 KB Output is correct
24 Correct 5 ms 41304 KB Output is correct
25 Correct 5 ms 41308 KB Output is correct
26 Correct 5 ms 41308 KB Output is correct
27 Correct 4 ms 41304 KB Output is correct
28 Correct 4 ms 41308 KB Output is correct
29 Correct 5 ms 41304 KB Output is correct
30 Correct 5 ms 41308 KB Output is correct
31 Correct 5 ms 41308 KB Output is correct
32 Correct 5 ms 41448 KB Output is correct
33 Correct 5 ms 41308 KB Output is correct
34 Correct 4 ms 41500 KB Output is correct
35 Correct 5 ms 41436 KB Output is correct
36 Correct 4 ms 41440 KB Output is correct
37 Correct 4 ms 41308 KB Output is correct
38 Correct 5 ms 41308 KB Output is correct
39 Correct 5 ms 41428 KB Output is correct
40 Correct 5 ms 41308 KB Output is correct

Subtask #5
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14680 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 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 3 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 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 14684 KB Output is correct
16 Correct 5 ms 41304 KB Output is correct
17 Correct 5 ms 41308 KB Output is correct
18 Correct 5 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 4 ms 41436 KB Output is correct
22 Correct 4 ms 41304 KB Output is correct
23 Correct 5 ms 41308 KB Output is correct
24 Correct 5 ms 41304 KB Output is correct
25 Correct 5 ms 41308 KB Output is correct
26 Correct 5 ms 41308 KB Output is correct
27 Correct 4 ms 41304 KB Output is correct
28 Correct 4 ms 41308 KB Output is correct
29 Correct 5 ms 41304 KB Output is correct
30 Correct 5 ms 41308 KB Output is correct
31 Correct 5 ms 41308 KB Output is correct
32 Correct 5 ms 41448 KB Output is correct
33 Correct 5 ms 41308 KB Output is correct
34 Correct 4 ms 41500 KB Output is correct
35 Correct 5 ms 41436 KB Output is correct
36 Correct 4 ms 41440 KB Output is correct
37 Correct 4 ms 41308 KB Output is correct
38 Correct 5 ms 41308 KB Output is correct
39 Correct 5 ms 41428 KB Output is correct
40 Correct 5 ms 41308 KB Output is correct
41 Correct 21 ms 197424 KB Output is correct
42 Correct 20 ms 197204 KB Output is correct
43 Correct 21 ms 197424 KB Output is correct
44 Correct 22 ms 197356 KB Output is correct
45 Correct 23 ms 197468 KB Output is correct
46 Correct 22 ms 197468 KB Output is correct
47 Correct 26 ms 197468 KB Output is correct
48 Correct 24 ms 197212 KB Output is correct
49 Correct 35 ms 197208 KB Output is correct
50 Correct 27 ms 197440 KB Output is correct
51 Correct 32 ms 197456 KB Output is correct
52 Correct 34 ms 197212 KB Output is correct
53 Correct 23 ms 197476 KB Output is correct
54 Correct 24 ms 197212 KB Output is correct
55 Correct 29 ms 197352 KB Output is correct
56 Correct 23 ms 197468 KB Output is correct
57 Correct 25 ms 197204 KB Output is correct
58 Correct 27 ms 197400 KB Output is correct
59 Correct 30 ms 197212 KB Output is correct
60 Correct 25 ms 197212 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2383 ms 892752 KB Output is correct
2 Correct 2317 ms 892244 KB Output is correct
3 Execution timed out 2540 ms 909168 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 6744 KB Output is correct
4 Correct 1 ms 8656 KB Output is correct
5 Correct 116 ms 655208 KB Output is correct
6 Correct 319 ms 708432 KB Output is correct
7 Correct 870 ms 800232 KB Output is correct
8 Correct 1402 ms 887248 KB Output is correct
9 Correct 1761 ms 918788 KB Output is correct
10 Correct 1295 ms 873588 KB Output is correct
11 Correct 1 ms 2392 KB Output is correct
12 Correct 523 ms 729840 KB Output is correct
13 Correct 373 ms 705020 KB Output is correct
14 Correct 255 ms 692532 KB Output is correct
15 Correct 1711 ms 873112 KB Output is correct
16 Correct 1461 ms 817180 KB Output is correct
17 Incorrect 1413 ms 873552 KB Output isn't correct
18 Halted 0 ms 0 KB -