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Submission #541576

# Submission time Handle Problem Language Result Execution time Memory
541576 2022-03-23T19:03:37 Z adespawn Mousetrap (CEOI17_mousetrap) C++14
65 / 100
 5000 ms 331824 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> sc[1000006];
bool isS[1000006];

int n, m, k;

int solve(int w, int f, int a = 1)
{
    priority_queue<int> k;
    if (w == m)
        return 0;
    for (auto i : sc[w])
    {
        if (i == f || isS[i])
            continue;
        k.push(solve(i, w));
    }
    while (k.size() < a + 1)
        k.push(0);
    for (int i = 0; (i < a) && (k.size() > 1); i++)
        k.pop();
    return sc[w].size() - 1 + k.top();
}

stack<pair<int, int>> s;

int nw;

vector<vector<int>> v;
vector<int> sp;

int dfs(int w, int f = 0, int g = 1, int z = 0)
{
    if (w == m)
    {
        v.push_back(sp);
        sp.push_back(0);
        return 1;
    }
    for (auto i : sc[w])
    {
        if (i == f)
            continue;
        int x = dfs(i, w, g + 1, z + sc[w].size() - 2 + (f == 0));
        if (x == 0)
            continue;
        isS[i] = 1;
        vector<int> tv;
        for (auto j : sc[w])
        {
            if (j == f || i == j)
                continue;
            tv.push_back(solve(j, w) + 1);
        }
        tv.push_back(0);
        sort(tv.begin(), tv.end());
        reverse(tv.begin(), tv.end());
        int z = sp.back() + tv.size() - 1;
        sp.push_back(z);
        v.push_back(tv);
        // cout << w << ' ' << sp.back() << '\n';
        // for (auto j : tv)
        //     cout << j << ' ';
        // cout << '\n';
        return 1;
    }
    return 0;
}

map<pair<int, int>, int> mp;
int solve2(int w, int a)
{
    if (w == 0 || a == 0)
        return 0;
    int mnw = 100000000;
    if (mp[{w, a}] != 0)
        return mp[{w, a}];
    // cout << w << '\n';
    for (int i = 0; i < min(a + 1, (int)v[w].size()); i++)
    {
        mnw = min(max(v[w][i] + sp[w - 1] + max((int)(v[w].size() - i - 2), 0), solve2(w - 1, a - i + 1)) + i, mnw);
    }
    mp[{w, a}] = mnw;
    // cout << w << ' ' << a << ' ' << mnw << '\n';
    return mnw;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin >> n >> m >> k;
    for (int i = 1; i < n; i++)
    {
        int a, b;
        cin >> a >> b;
        sc[a].push_back(b);
        sc[b].push_back(a);
    }
    dfs(k);
    // cout << nw - 1 << '\n';
    // s.push({0, 0});
    cout << solve2(sp.size() - 1, 1);
}

Compilation message

mousetrap.cpp: In function 'int solve(int, int, int)':
mousetrap.cpp:20:21: warning: comparison of integer expressions of different signedness: 'std::priority_queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     while (k.size() < a + 1)
      |            ~~~~~~~~~^~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23796 KB Output is correct
3 Correct 14 ms 23764 KB Output is correct
4 Correct 13 ms 23892 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23812 KB Output is correct
7 Correct 12 ms 23748 KB Output is correct
8 Correct 13 ms 23812 KB Output is correct
9 Correct 14 ms 23764 KB Output is correct
10 Correct 12 ms 23812 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 331 ms 55084 KB Output is correct
2 Correct 303 ms 51924 KB Output is correct
3 Correct 751 ms 56132 KB Output is correct
4 Correct 347 ms 39996 KB Output is correct
5 Correct 764 ms 56200 KB Output is correct
6 Correct 781 ms 56312 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23796 KB Output is correct
3 Correct 14 ms 23764 KB Output is correct
4 Correct 13 ms 23892 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23812 KB Output is correct
7 Correct 12 ms 23748 KB Output is correct
8 Correct 13 ms 23812 KB Output is correct
9 Correct 14 ms 23764 KB Output is correct
10 Correct 12 ms 23812 KB Output is correct
11 Correct 13 ms 23764 KB Output is correct
12 Correct 14 ms 23764 KB Output is correct
13 Correct 13 ms 23944 KB Output is correct
14 Correct 13 ms 24148 KB Output is correct
15 Correct 13 ms 24020 KB Output is correct
16 Correct 13 ms 23840 KB Output is correct
17 Correct 13 ms 23824 KB Output is correct
18 Correct 15 ms 24140 KB Output is correct
19 Correct 15 ms 24148 KB Output is correct
20 Correct 15 ms 24192 KB Output is correct
21 Correct 15 ms 24148 KB Output is correct
22 Correct 14 ms 23924 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23796 KB Output is correct
3 Correct 14 ms 23764 KB Output is correct
4 Correct 13 ms 23892 KB Output is correct
5 Correct 12 ms 23812 KB Output is correct
6 Correct 12 ms 23812 KB Output is correct
7 Correct 12 ms 23748 KB Output is correct
8 Correct 13 ms 23812 KB Output is correct
9 Correct 14 ms 23764 KB Output is correct
10 Correct 12 ms 23812 KB Output is correct
11 Correct 331 ms 55084 KB Output is correct
12 Correct 303 ms 51924 KB Output is correct
13 Correct 751 ms 56132 KB Output is correct
14 Correct 347 ms 39996 KB Output is correct
15 Correct 764 ms 56200 KB Output is correct
16 Correct 781 ms 56312 KB Output is correct
17 Correct 13 ms 23764 KB Output is correct
18 Correct 14 ms 23764 KB Output is correct
19 Correct 13 ms 23944 KB Output is correct
20 Correct 13 ms 24148 KB Output is correct
21 Correct 13 ms 24020 KB Output is correct
22 Correct 13 ms 23840 KB Output is correct
23 Correct 13 ms 23824 KB Output is correct
24 Correct 15 ms 24140 KB Output is correct
25 Correct 15 ms 24148 KB Output is correct
26 Correct 15 ms 24192 KB Output is correct
27 Correct 15 ms 24148 KB Output is correct
28 Correct 14 ms 23924 KB Output is correct
29 Correct 12 ms 23792 KB Output is correct
30 Correct 341 ms 68576 KB Output is correct
31 Correct 347 ms 68428 KB Output is correct
32 Correct 874 ms 331824 KB Output is correct
33 Correct 394 ms 209480 KB Output is correct
34 Correct 793 ms 69576 KB Output is correct
35 Correct 797 ms 69508 KB Output is correct
36 Execution timed out 5076 ms 289092 KB Time limit exceeded
37 Halted 0 ms 0 KB -