oj.uz

Submission #851424

# Submission time Handle Problem Language Result Execution time Memory
851424 2023-09-19T18:04:54 Z EJIC_B_KEDAX Jail (JOI22_jail) C++14
72 / 100
 2322 ms 1048576 KB 
#include <bits/stdc++.h>
#include <random>

#ifndef LOCAL
//#pragma GCC optimize("O3")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("avx,avx2,bmi,bmi2,popcnt,lzcnt")
#endif
using namespace std;
typedef long long ll;
typedef double dd;
typedef long double ld;
typedef unsigned int uii;
#define x first
#define y second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void solve();

mt19937_64 mt(1);

int32_t main() {
#ifdef LOCAL
    freopen("input.in", "r", stdin);
    freopen("output.out", "w", stdout);
#else
    ios::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    //freopen("amusing.in", "r", stdin);
    //freopen("amusing.out", "w", stdout);
#endif
    cout << fixed << setprecision(30);
    int tests = 1;
    cin >> tests;
    while (tests--) {
        solve();
    }
}

int tim = 0;

bool ans = true;

void dfs(int s, int p, vector<vector<int>>& g, vector<int>& tin, vector<int>& tout, vector<int>& pr) {
    tin[s] = tim++;
    pr[s] = p;
    for (int i : g[s]) {
        if (i != p) {
            dfs(i, s, g, tin, tout, pr);
        }
    }
    tout[s] = tim++;
}

void find_cycle(int s, vector<vector<int>>& g, vector<int>& used) {
    used[s] = 1;
    for (int i : g[s]) {
        if (used[i] == 1) {
            ans = false;
        }
        if (!used[i]) {
            find_cycle(i, g, used);
        }
    }
    used[s] = 2;
}

bool a_p_b(int a, int b, vector<int>& tin, vector<int>& tout) {
    return tin[a] <= tin[b] && tout[a] >= tout[b];
}

struct path {
    int u, v;
};

void solve() {
    tim = 0;
    int n;
    cin >> n;
    vector<vector<int>> g(n);
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        cin >> u >> v; v--; u--;
        g[v].push_back(u);
        g[u].push_back(v);
    }
    vector<int> s(n, -1), t(n, -1), tin(n), tout(n), pr(n), cnt(n, 0);
    dfs(0, -1, g, tin, tout, pr);
    int q;
    cin >> q;
    ans = true;
    vector<int> u, used(q, 0);
    vector<path> z;
    vector<vector<int>> h(q);
    for (int i = 0; i < q; i++) {
        int a, b;
        cin >> a >> b; a--; b--;
        s[a] = i;
        t[b] = i;
        z.push_back({a, b});
    }
    for (int ii = 0; ii < q; ii++) {
        int a, b;
        a = z[ii].u;
        b = z[ii].v;
        int a1 = a, b1 = b;
        while (!a_p_b(a1, b, tin, tout)) {
            if (s[a1] != -1) {
                cnt[s[a1]] += 2;
                u.push_back(s[a1]);
            }
            if (t[a1] != -1) {
                cnt[t[a1]]++;
                u.push_back(t[a1]);
            }
            a1 = pr[a1];
        }
        while (!a_p_b(b1, a, tin, tout)) {
            if (s[b1] != -1) {
                cnt[s[b1]] += 2;
                u.push_back(s[b1]);
            }
            if (t[b1] != -1) {
                cnt[t[b1]]++;
                u.push_back(t[b1]);
            }
            b1 = pr[b1];
        }
        if (s[b1] != -1) {
            cnt[s[b1]] += 2;
            u.push_back(s[b1]);
        }
        if (t[b1] != -1) {
            cnt[t[b1]]++;
            u.push_back(t[b1]);
        }
        for (int i : u) {
            if (!cnt[i]) {
                continue;
            }
            if (cnt[i] == 2) {
                h[ii].push_back(i);
            }
            if (cnt[i] == 1) {
                h[i].push_back(ii);
            }
            if (cnt[i] > 2 && i != ii) {
                cout << "No\n";
                return;
            }
            cnt[i] = 0;
        }
        u.clear();
    }
    ans = true;
    for (int i = 0; i < q; i++) {
        if (!used[i]) {
            find_cycle(i, h, used);
            if (!ans) {
                cout << "No\n";
                return;
            }
        }
    }
    if (ans) {
        cout << "Yes\n";
    } else {
        cout << "No\n";
    }
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 10 ms 428 KB Output is correct
5 Correct 20 ms 344 KB Output is correct
6 Correct 1 ms 416 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 40 ms 2804 KB Output is correct
10 Correct 165 ms 22376 KB Output is correct
11 Correct 4 ms 348 KB Output is correct
12 Correct 40 ms 344 KB Output is correct
13 Correct 116 ms 52628 KB Output is correct
14 Correct 42 ms 24016 KB Output is correct
15 Correct 39 ms 22988 KB Output is correct
16 Correct 56 ms 25988 KB Output is correct
17 Runtime error 2322 ms 1048576 KB Execution killed with signal 9
18 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 504 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 356 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct

Subtask #4
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 504 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 356 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 3 ms 344 KB Output is correct
30 Correct 2 ms 344 KB Output is correct
31 Correct 2 ms 600 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 2 ms 344 KB Output is correct
35 Correct 2 ms 344 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 2 ms 344 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 2 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 504 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 2 ms 356 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 3 ms 344 KB Output is correct
30 Correct 2 ms 344 KB Output is correct
31 Correct 2 ms 600 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 2 ms 344 KB Output is correct
35 Correct 2 ms 344 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 47 ms 2844 KB Output is correct
39 Correct 163 ms 22492 KB Output is correct
40 Correct 39 ms 968 KB Output is correct
41 Correct 26 ms 968 KB Output is correct
42 Correct 20 ms 1228 KB Output is correct
43 Correct 22 ms 1172 KB Output is correct
44 Correct 6 ms 600 KB Output is correct
45 Correct 31 ms 9732 KB Output is correct
46 Correct 55 ms 9808 KB Output is correct
47 Correct 52 ms 15516 KB Output is correct
48 Correct 52 ms 15520 KB Output is correct
49 Correct 27 ms 9932 KB Output is correct
50 Correct 48 ms 10084 KB Output is correct
51 Correct 27 ms 11600 KB Output is correct
52 Correct 28 ms 11608 KB Output is correct
53 Correct 8 ms 1112 KB Output is correct
54 Correct 33 ms 9812 KB Output is correct

Subtask #6
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 2 ms 344 KB Output is correct
13 Correct 16 ms 348 KB Output is correct
14 Correct 27 ms 348 KB Output is correct
15 Correct 22 ms 344 KB Output is correct
16 Correct 33 ms 10584 KB Output is correct
17 Correct 40 ms 12240 KB Output is correct
18 Correct 50 ms 14836 KB Output is correct
19 Correct 36 ms 11016 KB Output is correct
20 Correct 31 ms 10932 KB Output is correct
21 Correct 37 ms 10956 KB Output is correct
22 Correct 58 ms 12496 KB Output is correct
23 Correct 45 ms 12240 KB Output is correct
24 Correct 84 ms 18124 KB Output is correct
25 Correct 48 ms 14800 KB Output is correct
26 Correct 73 ms 18308 KB Output is correct
27 Correct 66 ms 22304 KB Output is correct
28 Correct 69 ms 23876 KB Output is correct
29 Correct 78 ms 20808 KB Output is correct
30 Correct 49 ms 16328 KB Output is correct
31 Correct 54 ms 16728 KB Output is correct
32 Correct 63 ms 16116 KB Output is correct
33 Correct 49 ms 16712 KB Output is correct

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 10 ms 428 KB Output is correct
5 Correct 20 ms 344 KB Output is correct
6 Correct 1 ms 416 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 3 ms 344 KB Output is correct
9 Correct 40 ms 2804 KB Output is correct
10 Correct 165 ms 22376 KB Output is correct
11 Correct 4 ms 348 KB Output is correct
12 Correct 40 ms 344 KB Output is correct
13 Correct 116 ms 52628 KB Output is correct
14 Correct 42 ms 24016 KB Output is correct
15 Correct 39 ms 22988 KB Output is correct
16 Correct 56 ms 25988 KB Output is correct
17 Runtime error 2322 ms 1048576 KB Execution killed with signal 9
18 Halted 0 ms 0 KB -