oj.uz

Submission #705371

# Submission time Handle Problem Language Result Execution time Memory
705371 2023-03-04T07:13:18 Z LittleCube File Paths (BOI15_fil) C++14
100 / 100
 114 ms 25840 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define F first
#define S second
using namespace std;

int n, m, k, s, dep[6006], occ[2000006], l[6006], ans[6006];
vector<int> E[6006], cur, child[6006];

void dfs(int u)
{
    if (u <= n)
    {
        cur.emplace_back(u);
        for(auto p : cur)
            child[p].emplace_back(u);
        for (auto v : E[u])
        {
            dep[v] = dep[u] + l[v];
            dfs(v);
        }
        cur.pop_back();
    }
    else
    {
        ans[u] = (dep[u] == k);
        for (int i = 1; i * i <= k - dep[u]; i++)
            if ((k - dep[u]) % i == 0)
            {
                int j = (k - dep[u]) / i;
                ans[u] |= (occ[i] || occ[j]);
            }
    }
}

void dfscycle(int u)
{
    if (u <= n)
    {
        for (auto c : child[u])
            occ[dep[c] - dep[u] + s]++;

        for (auto v : E[u])
            dfscycle(v);
        

        for (auto c : child[u])
            occ[dep[c] - dep[u] + s]--;
    }
    else
    {
        ans[u] = (dep[u] == k);
        for (int i = 1; i * i <= k - dep[u]; i++)
            if ((k - dep[u]) % i == 0)
            {
                int j = (k - dep[u]) / i;
                ans[u] |= (occ[i] || occ[j]);
            }
    }
}

void dfsjump(int u)
{
    if (u <= n)
    {
        cur.emplace_back(u);
        for (auto v : E[u])
            dfsjump(v);
        cur.pop_back();
    }
    else
    {
        for (auto p : cur)
        {
            int d = k - (dep[u] - dep[p] + s);
            if(d >= 0)
                ans[u] |= occ[d];
        }
    }
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    cin >> n >> m >> k >> s;
    s++;
    for (int i = 1; i <= n + m; i++)
    {
        int p;
        cin >> p >> l[i];
        l[i]++;
        E[p].emplace_back(i);
    }
    dfs(0);
    dfscycle(0);
    for (int i = 0; i <= n; i++)
        occ[dep[i]]++;
    dfsjump(0);
    for (int i = n + 1; i <= n + m; i++)
        cout << (ans[i] ? "YES\n" : "NO\n");
}

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 2 ms 980 KB Output is correct
4 Correct 3 ms 1492 KB Output is correct
5 Correct 7 ms 4820 KB Output is correct
6 Correct 6 ms 3796 KB Output is correct
7 Correct 9 ms 5532 KB Output is correct
8 Correct 4 ms 4052 KB Output is correct
9 Correct 4 ms 4080 KB Output is correct
10 Correct 0 ms 616 KB Output is correct
11 Correct 1 ms 628 KB Output is correct
12 Correct 3 ms 1364 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 4808 KB Output is correct
2 Correct 16 ms 4820 KB Output is correct
3 Correct 15 ms 4788 KB Output is correct
4 Correct 15 ms 4820 KB Output is correct
5 Correct 114 ms 24948 KB Output is correct
6 Correct 96 ms 24556 KB Output is correct
7 Correct 71 ms 15788 KB Output is correct
8 Correct 72 ms 15568 KB Output is correct
9 Correct 16 ms 4948 KB Output is correct
10 Correct 14 ms 4948 KB Output is correct
11 Correct 5 ms 1516 KB Output is correct
12 Correct 92 ms 21556 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 2 ms 980 KB Output is correct
4 Correct 3 ms 1492 KB Output is correct
5 Correct 7 ms 4820 KB Output is correct
6 Correct 6 ms 3796 KB Output is correct
7 Correct 9 ms 5532 KB Output is correct
8 Correct 4 ms 4052 KB Output is correct
9 Correct 4 ms 4080 KB Output is correct
10 Correct 0 ms 616 KB Output is correct
11 Correct 1 ms 628 KB Output is correct
12 Correct 3 ms 1364 KB Output is correct
13 Correct 15 ms 4808 KB Output is correct
14 Correct 16 ms 4820 KB Output is correct
15 Correct 15 ms 4788 KB Output is correct
16 Correct 15 ms 4820 KB Output is correct
17 Correct 114 ms 24948 KB Output is correct
18 Correct 96 ms 24556 KB Output is correct
19 Correct 71 ms 15788 KB Output is correct
20 Correct 72 ms 15568 KB Output is correct
21 Correct 16 ms 4948 KB Output is correct
22 Correct 14 ms 4948 KB Output is correct
23 Correct 5 ms 1516 KB Output is correct
24 Correct 92 ms 21556 KB Output is correct
25 Correct 14 ms 4916 KB Output is correct
26 Correct 13 ms 4852 KB Output is correct
27 Correct 13 ms 4820 KB Output is correct
28 Correct 14 ms 4724 KB Output is correct
29 Correct 107 ms 24708 KB Output is correct
30 Correct 112 ms 25036 KB Output is correct
31 Correct 76 ms 15920 KB Output is correct
32 Correct 75 ms 15664 KB Output is correct
33 Correct 13 ms 5068 KB Output is correct
34 Correct 12 ms 5004 KB Output is correct
35 Correct 6 ms 1364 KB Output is correct
36 Correct 93 ms 25840 KB Output is correct