oj.uz

Submission #1084609

# Submission time Handle Problem Language Result Execution time Memory
1084609 2024-09-06T13:48:26 Z GasmaskChan Let's Win the Election (JOI22_ho_t3) C++17
0 / 100
 186 ms 4432 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) {
            if (a.second != b.second) return a.second < b.second;
            return a.first > b.first;
        }
        return a.second > b.second;
    });

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

        for (int j = 1; j <= i + 1; j++) {
            for (int z = 1; z <= k; z++) {
                f[i & 1][j][z] = min(f[(i - 1) & 1][j][z - 1] + (1.0 * state[i].first / j), f[(i - 1) & 1][j][z]);
                if (j > 1 && 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
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Incorrect 1 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Incorrect 1 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 186 ms 4432 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Incorrect 1 ms 2396 KB Output isn't correct
4 Halted 0 ms 0 KB -