oj.uz

Submission #852349

# Submission time Handle Problem Language Result Execution time Memory
852349 2023-09-21T16:16:29 Z EJIC_B_KEDAX Jail (JOI22_jail) C++14
5 / 100
 5000 ms 26152 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) {
                if (a_p_b(a, z[i].v, tin, tout) ^ a_p_b(a, b, tin, tout)) {
                    cout << "No\n";
                    return;
                }
            }
            if (cnt[i] == 1) {
                if (a_p_b(b, z[i].u, tin, tout) ^ a_p_b(b, a, tin, tout)) {
                    cout << "No\n";
                    return;
                }
            }
            if (cnt[i] > 2 && i != ii) {
                cout << "No\n";
                return;
            }
            cnt[i] = 0;
        }
        u.clear();
    }
    for (int ii = 0; ii < q; ii++) {
        int a, b;
        a = z[ii].u;
        b = z[ii].v;
        int a1 = a, b1 = b;
        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]);
        }
        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);
            }
            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 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 10 ms 432 KB Output is correct
5 Correct 20 ms 480 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 30 ms 1528 KB Output is correct
10 Correct 177 ms 21084 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 25 ms 508 KB Output is correct
13 Correct 72 ms 23244 KB Output is correct
14 Correct 40 ms 23500 KB Output is correct
15 Correct 39 ms 22988 KB Output is correct
16 Correct 48 ms 26152 KB Output is correct
17 Execution timed out 5077 ms 23612 KB Time limit exceeded
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 348 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 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 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 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 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 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 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Incorrect 1 ms 544 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 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 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 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 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Incorrect 1 ms 544 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 500 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 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 348 KB Output is correct
13 Correct 2 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 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 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Incorrect 1 ms 544 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 4 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Incorrect 0 ms 348 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 10 ms 432 KB Output is correct
5 Correct 20 ms 480 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 30 ms 1528 KB Output is correct
10 Correct 177 ms 21084 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 25 ms 508 KB Output is correct
13 Correct 72 ms 23244 KB Output is correct
14 Correct 40 ms 23500 KB Output is correct
15 Correct 39 ms 22988 KB Output is correct
16 Correct 48 ms 26152 KB Output is correct
17 Execution timed out 5077 ms 23612 KB Time limit exceeded
18 Halted 0 ms 0 KB -