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Submission #541796

# Submission time Handle Problem Language Result Execution time Memory
541796 2022-03-24T12:00:46 Z adespawn Mousetrap (CEOI17_mousetrap) C++14
100 / 100
 1831 ms 288512 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();
}

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);
        return 1;
    }
    return 0;
}

int illR;
unordered_map<long long, int> mp;
int solve2(int w, int a, int miip = 0)
{
    if (w == 0)
        return 0;
    int mnw = 100000000;
    long long k = (long long)w + (long long)a * (long long)1000000 + (long long)miip * (long long)1000000000000;
    if (mp[k] != 0)
        return mp[k];
    int csp = 0;
    for (int i = min(a + 1, (int)v[w].size()) - 1; i >= 0; i--)
    {
        csp = v[w][i] + sp[w - 1] + max((int)(v[w].size() - i - 2), 0) + i;
        int cll = solve2(w - 1, a - i + 1, max(miip - i, csp - i));
        mnw = min(max(csp - i, cll) + i, mnw);
        if (mnw < miip)
            break;
    }
    if (mnw == 100000000)
        mnw = 0;
    mp[k] = mnw;
    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);
    for (int i = 1; i <= n; i++)
        sc[i].clear();
    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 23764 KB Output is correct
3 Correct 12 ms 23788 KB Output is correct
4 Correct 12 ms 23808 KB Output is correct
5 Correct 12 ms 23700 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23688 KB Output is correct
8 Correct 15 ms 23812 KB Output is correct
9 Correct 12 ms 23700 KB Output is correct
10 Correct 13 ms 23816 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 352 ms 68184 KB Output is correct
2 Correct 395 ms 63896 KB Output is correct
3 Correct 801 ms 69328 KB Output is correct
4 Correct 364 ms 46420 KB Output is correct
5 Correct 860 ms 69340 KB Output is correct
6 Correct 844 ms 69272 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 23764 KB Output is correct
3 Correct 12 ms 23788 KB Output is correct
4 Correct 12 ms 23808 KB Output is correct
5 Correct 12 ms 23700 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23688 KB Output is correct
8 Correct 15 ms 23812 KB Output is correct
9 Correct 12 ms 23700 KB Output is correct
10 Correct 13 ms 23816 KB Output is correct
11 Correct 12 ms 23764 KB Output is correct
12 Correct 15 ms 23792 KB Output is correct
13 Correct 14 ms 23812 KB Output is correct
14 Correct 13 ms 24048 KB Output is correct
15 Correct 12 ms 24048 KB Output is correct
16 Correct 13 ms 23812 KB Output is correct
17 Correct 13 ms 23764 KB Output is correct
18 Correct 14 ms 23816 KB Output is correct
19 Correct 15 ms 23764 KB Output is correct
20 Correct 13 ms 23764 KB Output is correct
21 Correct 13 ms 23776 KB Output is correct
22 Correct 12 ms 23764 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 23764 KB Output is correct
2 Correct 12 ms 23764 KB Output is correct
3 Correct 12 ms 23788 KB Output is correct
4 Correct 12 ms 23808 KB Output is correct
5 Correct 12 ms 23700 KB Output is correct
6 Correct 13 ms 23764 KB Output is correct
7 Correct 12 ms 23688 KB Output is correct
8 Correct 15 ms 23812 KB Output is correct
9 Correct 12 ms 23700 KB Output is correct
10 Correct 13 ms 23816 KB Output is correct
11 Correct 352 ms 68184 KB Output is correct
12 Correct 395 ms 63896 KB Output is correct
13 Correct 801 ms 69328 KB Output is correct
14 Correct 364 ms 46420 KB Output is correct
15 Correct 860 ms 69340 KB Output is correct
16 Correct 844 ms 69272 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 15 ms 23792 KB Output is correct
19 Correct 14 ms 23812 KB Output is correct
20 Correct 13 ms 24048 KB Output is correct
21 Correct 12 ms 24048 KB Output is correct
22 Correct 13 ms 23812 KB Output is correct
23 Correct 13 ms 23764 KB Output is correct
24 Correct 14 ms 23816 KB Output is correct
25 Correct 15 ms 23764 KB Output is correct
26 Correct 13 ms 23764 KB Output is correct
27 Correct 13 ms 23776 KB Output is correct
28 Correct 12 ms 23764 KB Output is correct
29 Correct 13 ms 23764 KB Output is correct
30 Correct 353 ms 61020 KB Output is correct
31 Correct 372 ms 61144 KB Output is correct
32 Correct 678 ms 288512 KB Output is correct
33 Correct 394 ms 202048 KB Output is correct
34 Correct 884 ms 62280 KB Output is correct
35 Correct 859 ms 62308 KB Output is correct
36 Correct 902 ms 90188 KB Output is correct
37 Correct 822 ms 85412 KB Output is correct
38 Correct 810 ms 92748 KB Output is correct
39 Correct 1831 ms 170360 KB Output is correct
40 Correct 1120 ms 129812 KB Output is correct