oj.uz

Submission #914896

# Submission time Handle Problem Language Result Execution time Memory
914896 2024-01-22T20:22:32 Z andrei_iorgulescu Let's Win the Election (JOI22_ho_t3) C++14
10 / 100
 842 ms 2800 KB 
#include <bits/stdc++.h>

using namespace std;
using ld = long double;

#define int long long

int n,k;
ld m;
ld a[505],b[505];
ld v[505];

int better(int x,int y,ld t)
{
    ld p1 = v[y] + b[x] / t,p2 = v[x] + b[y] / t;
    //cout << x << ' ' << y << ' ' << t << ' ' << p1 << ' ' << p2 << endl;
    if (p1 < p2)
        return x;
    //cout << y << endl;
    return y;
}

ld solve(int pos,vector<int>ids)
{
    if (pos == m + 1)
    {
        vector<ld>as;
        for (auto it : ids)
            as.push_back(v[it]);
        sort(as.begin(),as.end());
        ld adg = 0;
        for (int i = 0; i < k - m + 1; i++)
            adg += as[i];
        return adg;
    }
    int opt = 0;
    for (int i = 1; i < ids.size(); i++)
    {
        int bt = better(ids[i],ids[opt],pos - 1);
        if (bt == ids[i])
            opt = i;
    }
    //cout << opt << ' ' << ids[opt] << endl;
    ld pz = pos - 1;
    ld adg = b[ids[opt]] / pz;
    vector<int>newids;
    for (int i = 0; i < opt; i++)
        newids.push_back(ids[i]);
    for (int i = opt + 1; i < ids.size(); i++)
        newids.push_back(ids[i]);
    return adg + solve(pos + 1,newids);
}

signed main()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
        cin >> a[i] >> b[i];
    for (int i = 1; i <= n; i++)
        if (b[i] == -1)
            b[i] = 1e9;
    ld ans = 1e9;
    for (m = 1; m <= k; m++)
    {
        ///m oameni workpower, apoi doar merg prin orase
        for (int i = 1; i <= n; i++)
            v[i] = a[i] / m;
        vector<int>ids;
        for (int i = 1; i <= n; i++)
            ids.push_back(i);
        ld cur = solve(2,ids);
        //cout << cur << endl;
        ans = min(ans,cur);
    }
    cout << setprecision(5) << fixed;
    cout << ans;
    return 0;
}

Compilation message

Main.cpp: In function 'ld solve(long long int, std::vector<long long int>)':
Main.cpp:37:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for (int i = 1; i < ids.size(); i++)
      |                     ~~^~~~~~~~~~~~
Main.cpp:49:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = opt + 1; i < ids.size(); i++)
      |                           ~~^~~~~~~~~~~~

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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 16 ms 800 KB Output is correct
6 Correct 87 ms 1352 KB Output is correct
7 Correct 334 ms 2200 KB Output is correct
8 Correct 680 ms 2648 KB Output is correct
9 Correct 826 ms 2800 KB Output is correct
10 Correct 607 ms 2572 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 16 ms 800 KB Output is correct
6 Correct 87 ms 1352 KB Output is correct
7 Correct 334 ms 2200 KB Output is correct
8 Correct 680 ms 2648 KB Output is correct
9 Correct 826 ms 2800 KB Output is correct
10 Correct 607 ms 2572 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 125 ms 1556 KB Output is correct
13 Correct 131 ms 1784 KB Output is correct
14 Correct 124 ms 1596 KB Output is correct
15 Correct 610 ms 2716 KB Output is correct
16 Correct 603 ms 2584 KB Output is correct
17 Correct 621 ms 2612 KB Output is correct
18 Correct 835 ms 2676 KB Output is correct
19 Correct 834 ms 2760 KB Output is correct
20 Correct 840 ms 2768 KB Output is correct

Subtask #3
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 842 ms 2676 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 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 16 ms 800 KB Output is correct
6 Correct 87 ms 1352 KB Output is correct
7 Correct 334 ms 2200 KB Output is correct
8 Correct 680 ms 2648 KB Output is correct
9 Correct 826 ms 2800 KB Output is correct
10 Correct 607 ms 2572 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 125 ms 1556 KB Output is correct
13 Correct 131 ms 1784 KB Output is correct
14 Correct 124 ms 1596 KB Output is correct
15 Correct 610 ms 2716 KB Output is correct
16 Correct 603 ms 2584 KB Output is correct
17 Correct 621 ms 2612 KB Output is correct
18 Correct 835 ms 2676 KB Output is correct
19 Correct 834 ms 2760 KB Output is correct
20 Correct 840 ms 2768 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 1 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 1 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Incorrect 1 ms 348 KB Output isn't correct
33 Halted 0 ms 0 KB -