oj.uz

Submission #712782

# Submission time Handle Problem Language Result Execution time Memory
712782 2023-03-20T01:06:16 Z GrindMachine Jail (JOI22_jail) C++17
0 / 100
 5000 ms 1048576 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 120000 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<pll> adj[N];
vector<pll> edges(N);
vector<ll> dir(N);
vector<array<ll, 3>> curr;
bool reach;

void dfs(ll u, ll p, ll des) {
    if (u == des) {
        reach = true;
        for (auto [x, y, id] : curr) {
            if (x == edges[id].ff and y == edges[id].ss) {
                dir[id] = 0;
            }
            else {
                dir[id] = 1;
            }
        }
    }

    for (auto [v, id] : adj[u]) {
        if (v == p) conts;

        bool good = false;

        if (dir[id] == -1) {
            good = true;
        }
        else if (dir[id] == 0) {
            if (u == edges[id].ff and v == edges[id].ss) {
                good = true;
            }
        }
        else {
            if (u == edges[id].ss and v == edges[id].ff) {
                good = true;
            }
        }

        if (good) {
            curr.pb({u, v, id});
            dfs(v, u, des);
            curr.pop_back();
        }
    }
}

void solve(int test_case)
{
    ll n; cin >> n;

    rep1(i, n) {
        adj[i].clear();
        dir[i] = -1;
    }

    rep1(i, n - 1) {
        ll u, v; cin >> u >> v;
        edges[i] = {u, v};
        adj[u].pb({v, i}), adj[v].pb({u, i});
    }

    ll m; cin >> m;

    while (m--) {
        ll u, v; cin >> u >> v;
        reach = false;
        dfs(u, -1, v);

        if (!reach) {
            no;
            return;
        }
    }

    yes;
}

int main()
{
    fastio;

    int t = 1;
    cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5844 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Execution timed out 5038 ms 65244 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Incorrect 4 ms 5984 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Incorrect 4 ms 5984 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Incorrect 4 ms 5984 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5972 KB Output is correct
3 Incorrect 4 ms 5984 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5880 KB Output is correct
2 Correct 3 ms 5844 KB Output is correct
3 Correct 3 ms 5844 KB Output is correct
4 Correct 5 ms 5844 KB Output is correct
5 Runtime error 618 ms 1048576 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5844 KB Output is correct
2 Correct 3 ms 5844 KB Output is correct
3 Correct 3 ms 5972 KB Output is correct
4 Execution timed out 5038 ms 65244 KB Time limit exceeded
5 Halted 0 ms 0 KB -