oj.uz

Submission #1084625

# Submission time Handle Problem Language Result Execution time Memory
1084625 2024-09-06T14:48:12 Z GasmaskChan Let's Win the Election (JOI22_ho_t3) C++17
10 / 100
 219 ms 4444 KB 
#include <bits/stdc++.h>

using namespace std;
#define int long long

const int MAX = 5e2 + 5;

pair<int, int> state[MAX];
double f[2][MAX][MAX];
int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // freopen("test.inp", "r", stdin); freopen("test.out", "w", stdout);
    int n, k;
    cin >> n >> k;
    for (int i = 1; i <= n; i++) cin >> state[i].first >> state[i].second;

    sort(state + 1, state + n + 1, [](const pair<int, int> &a, const pair<int, int> &b) -> bool {
        if (a.second != -1 && b.second != -1) {
            return 2 * a.second - a.first < 2 * b.second - b.first;
        }
        return a.second > b.second;
    });

    for (int i = 0; i < 2; i++) {
        for (int j = 0; j <= n + 1; j++) {
            for (int z = 0; z <= k; z++) {
                f[i & 1][j][z] = 1e9;
            }
        }
    }

    f[0][1][0] = 0.0;

    for (int i = 1; i <= n; i++) {

        for (int j = 1; j <= i + 1; j++) {
            for (int z = 0; z <= k; z++) {
                f[i & 1][j][z] = 1e9;
            }
        }

        for (int j = 1; j <= i + 1; j++) {
            for (int z = 0; z <= k; z++) {
                f[i & 1][j][z] = f[(i - 1) & 1][j][z];

                if (z) f[i & 1][j][z] = min(f[i & 1][j][z], f[(i - 1) & 1][j][z - 1] + (1.0 * state[i].first / j));

                if (j > 1 && z && state[i].second != -1) {
                    f[i & 1][j][z] = min(f[i & 1][j][z], f[(i - 1) & 1][j - 1][z - 1] + (1.0 * state[i].second / (j - 1)));
                }
            }
        }
    }

    double ans = 1e9;
    for (int j = 1; j <= n + 1; j++) {
        ans = min(ans, f[n & 1][j][k]);
    }

    cout << fixed << ans;
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 344 KB Output is correct
5 Correct 15 ms 4436 KB Output is correct
6 Correct 35 ms 4184 KB Output is correct
7 Correct 62 ms 4416 KB Output is correct
8 Correct 92 ms 4444 KB Output is correct
9 Correct 116 ms 4444 KB Output is correct
10 Correct 89 ms 4188 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 344 KB Output is correct
5 Correct 15 ms 4436 KB Output is correct
6 Correct 35 ms 4184 KB Output is correct
7 Correct 62 ms 4416 KB Output is correct
8 Correct 92 ms 4444 KB Output is correct
9 Correct 116 ms 4444 KB Output is correct
10 Correct 89 ms 4188 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 74 ms 4412 KB Output is correct
13 Correct 50 ms 4184 KB Output is correct
14 Correct 41 ms 4184 KB Output is correct
15 Correct 147 ms 4184 KB Output is correct
16 Correct 121 ms 4420 KB Output is correct
17 Correct 88 ms 4192 KB Output is correct
18 Correct 208 ms 4188 KB Output is correct
19 Correct 152 ms 4444 KB Output is correct
20 Correct 125 ms 4188 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 0 ms 348 KB Output is correct
7 Correct 1 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 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 0 ms 348 KB Output is correct
7 Correct 1 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 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 0 ms 348 KB Output is correct
7 Correct 1 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 Incorrect 1 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 219 ms 4188 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 344 KB Output is correct
5 Correct 15 ms 4436 KB Output is correct
6 Correct 35 ms 4184 KB Output is correct
7 Correct 62 ms 4416 KB Output is correct
8 Correct 92 ms 4444 KB Output is correct
9 Correct 116 ms 4444 KB Output is correct
10 Correct 89 ms 4188 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 74 ms 4412 KB Output is correct
13 Correct 50 ms 4184 KB Output is correct
14 Correct 41 ms 4184 KB Output is correct
15 Correct 147 ms 4184 KB Output is correct
16 Correct 121 ms 4420 KB Output is correct
17 Correct 88 ms 4192 KB Output is correct
18 Correct 208 ms 4188 KB Output is correct
19 Correct 152 ms 4444 KB Output is correct
20 Correct 125 ms 4188 KB Output is correct
21 Correct 0 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Incorrect 1 ms 348 KB Output isn't correct
31 Halted 0 ms 0 KB -