oj.uz

Submission #879953

# Submission time Handle Problem Language Result Execution time Memory
879953 2023-11-28T11:52:14 Z frostray8653 Let's Win the Election (JOI22_ho_t3) C++17
10 / 100
 275 ms 4748 KB 
#include <bits/stdc++.h>
#define int long long
#define IO ios::sync_with_stdio(0), cin.tie(0)
#define FOR(i, a, b) for (int i = a; i <= b; i++)
using namespace std;
using pii = pair<int, int>;

const int N = 505;
const int INF = 1e9;
const double dINF = 1e9;
pii a[N];

signed main() {
    IO;
    
    int n, tar;
    cin >> n >> tar;
    FOR(i, 1, n) {
        cin >> a[i].first >> a[i].second;
        if (a[i].second == -1)
            a[i].second = INF;
    }
    sort(a + 1, a + n + 1, [&](pii p, pii q) {
        return p.second < q.second;
    });
    vector<vector<double>> dp(n + 1, vector<double>(n + 1, dINF));
    dp[0][0] = 0;
    for (int i = 1; i <= n; i++) {
        vector<vector<double>> ndp(n + 1, vector<double>(n + 1, dINF));
        for (int j = 0; j < i; j++) {
            for (int k = 0; k <= j; k++) {
                if (dp[j][k] < dINF) {
                    ndp[j][k] = min(ndp[j][k], dp[j][k]);
                    if (a[i].second < INF)
                        ndp[j + 1][k + 1] = min(ndp[j + 1][k + 1], dp[j][k] + (double)a[i].second / (k + 1));
                    ndp[j + 1][k] = min(ndp[j + 1][k], dp[j][k] + (double)a[i].first / (k + 1));
                }
            }
        }
        swap(dp, ndp);
    }
    double ans = dINF;
    for (int k = 0; k <= n; k++)
        ans = min(ans, dp[tar][k]);
    cout << fixed << setprecision(15) << ans << "\n";

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 187 ms 4676 KB Output is correct
6 Correct 183 ms 4576 KB Output is correct
7 Correct 180 ms 4624 KB Output is correct
8 Correct 174 ms 4592 KB Output is correct
9 Correct 174 ms 4608 KB Output is correct
10 Correct 186 ms 4632 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 187 ms 4676 KB Output is correct
6 Correct 183 ms 4576 KB Output is correct
7 Correct 180 ms 4624 KB Output is correct
8 Correct 174 ms 4592 KB Output is correct
9 Correct 174 ms 4608 KB Output is correct
10 Correct 186 ms 4632 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 212 ms 4616 KB Output is correct
13 Correct 275 ms 4648 KB Output is correct
14 Correct 182 ms 4568 KB Output is correct
15 Correct 219 ms 4576 KB Output is correct
16 Correct 210 ms 4628 KB Output is correct
17 Correct 198 ms 4604 KB Output is correct
18 Correct 232 ms 4652 KB Output is correct
19 Correct 215 ms 4656 KB Output is correct
20 Correct 180 ms 4748 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 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 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 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 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 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 214 ms 4568 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 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 187 ms 4676 KB Output is correct
6 Correct 183 ms 4576 KB Output is correct
7 Correct 180 ms 4624 KB Output is correct
8 Correct 174 ms 4592 KB Output is correct
9 Correct 174 ms 4608 KB Output is correct
10 Correct 186 ms 4632 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 212 ms 4616 KB Output is correct
13 Correct 275 ms 4648 KB Output is correct
14 Correct 182 ms 4568 KB Output is correct
15 Correct 219 ms 4576 KB Output is correct
16 Correct 210 ms 4628 KB Output is correct
17 Correct 198 ms 4604 KB Output is correct
18 Correct 232 ms 4652 KB Output is correct
19 Correct 215 ms 4656 KB Output is correct
20 Correct 180 ms 4748 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 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Incorrect 0 ms 348 KB Output isn't correct
30 Halted 0 ms 0 KB -