oj.uz

Submission #705386

# Submission time Handle Problem Language Result Execution time Memory
705386 2023-03-04T08:22:55 Z LittleCube File Paths (BOI15_fil) C++14
100 / 100
 115 ms 25824 KB 
#pragma GCC optimize("Ofast,unroll-loops")
#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 1008 KB Output is correct
4 Correct 4 ms 1492 KB Output is correct
5 Correct 8 ms 4820 KB Output is correct
6 Correct 7 ms 3796 KB Output is correct
7 Correct 9 ms 5588 KB Output is correct
8 Correct 4 ms 4076 KB Output is correct
9 Correct 4 ms 4052 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 596 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 17 ms 4820 KB Output is correct
2 Correct 16 ms 4844 KB Output is correct
3 Correct 17 ms 4824 KB Output is correct
4 Correct 17 ms 4820 KB Output is correct
5 Correct 112 ms 25012 KB Output is correct
6 Correct 110 ms 24620 KB Output is correct
7 Correct 78 ms 15880 KB Output is correct
8 Correct 80 ms 15604 KB Output is correct
9 Correct 18 ms 4948 KB Output is correct
10 Correct 14 ms 4988 KB Output is correct
11 Correct 5 ms 1524 KB Output is correct
12 Correct 81 ms 21580 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 1008 KB Output is correct
4 Correct 4 ms 1492 KB Output is correct
5 Correct 8 ms 4820 KB Output is correct
6 Correct 7 ms 3796 KB Output is correct
7 Correct 9 ms 5588 KB Output is correct
8 Correct 4 ms 4076 KB Output is correct
9 Correct 4 ms 4052 KB Output is correct
10 Correct 1 ms 596 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 3 ms 1364 KB Output is correct
13 Correct 17 ms 4820 KB Output is correct
14 Correct 16 ms 4844 KB Output is correct
15 Correct 17 ms 4824 KB Output is correct
16 Correct 17 ms 4820 KB Output is correct
17 Correct 112 ms 25012 KB Output is correct
18 Correct 110 ms 24620 KB Output is correct
19 Correct 78 ms 15880 KB Output is correct
20 Correct 80 ms 15604 KB Output is correct
21 Correct 18 ms 4948 KB Output is correct
22 Correct 14 ms 4988 KB Output is correct
23 Correct 5 ms 1524 KB Output is correct
24 Correct 81 ms 21580 KB Output is correct
25 Correct 15 ms 4812 KB Output is correct
26 Correct 13 ms 4752 KB Output is correct
27 Correct 14 ms 4788 KB Output is correct
28 Correct 15 ms 4772 KB Output is correct
29 Correct 115 ms 24648 KB Output is correct
30 Correct 115 ms 24988 KB Output is correct
31 Correct 76 ms 15816 KB Output is correct
32 Correct 70 ms 15664 KB Output is correct
33 Correct 13 ms 5108 KB Output is correct
34 Correct 11 ms 5024 KB Output is correct
35 Correct 5 ms 1472 KB Output is correct
36 Correct 114 ms 25824 KB Output is correct