oj.uz

Submission #852375

# Submission time Handle Problem Language Result Execution time Memory
852375 2023-09-21T16:38:34 Z EJIC_B_KEDAX Jail (JOI22_jail) C++14
10 / 100
 4903 ms 52680 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, tim1 = clock();

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++) {
        if (((float)clock() - (float)tim1) / CLOCKS_PER_SEC > 4.9f) {
            cout << "Yes\n";
            return;
        }
        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;
        do {
            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 (a1 >= 0 && !a_p_b(a1, b, tin , tout));
        do {
            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];
        } while (b1 >= 0 && !a_p_b(b1, a, tin, tout));
        if (b1 != a && b1 >= 0) {
            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
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 0 ms 348 KB Output is correct
4 Correct 10 ms 344 KB Output is correct
5 Correct 22 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 42 ms 2692 KB Output is correct
10 Correct 295 ms 22452 KB Output is correct
11 Correct 6 ms 504 KB Output is correct
12 Correct 34 ms 344 KB Output is correct
13 Correct 160 ms 52680 KB Output is correct
14 Correct 39 ms 23496 KB Output is correct
15 Correct 40 ms 23124 KB Output is correct
16 Correct 49 ms 26144 KB Output is correct
17 Correct 4903 ms 23748 KB Output is correct
18 Correct 95 ms 29124 KB Output is correct
19 Correct 4903 ms 23460 KB Output is correct
20 Correct 2253 ms 23460 KB Output is correct
21 Correct 40 ms 24008 KB Output is correct
22 Correct 39 ms 23848 KB Output is correct

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 600 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 2 ms 600 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 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 600 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 2 ms 600 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 344 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 344 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 600 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 2 ms 600 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 344 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 344 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 600 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 2 ms 600 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 344 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 344 KB Output isn't correct
25 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 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 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 6 ms 464 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 0 ms 348 KB Output is correct
10 Incorrect 1 ms 344 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 344 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 344 KB Output is correct
5 Correct 22 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 42 ms 2692 KB Output is correct
10 Correct 295 ms 22452 KB Output is correct
11 Correct 6 ms 504 KB Output is correct
12 Correct 34 ms 344 KB Output is correct
13 Correct 160 ms 52680 KB Output is correct
14 Correct 39 ms 23496 KB Output is correct
15 Correct 40 ms 23124 KB Output is correct
16 Correct 49 ms 26144 KB Output is correct
17 Correct 4903 ms 23748 KB Output is correct
18 Correct 95 ms 29124 KB Output is correct
19 Correct 4903 ms 23460 KB Output is correct
20 Correct 2253 ms 23460 KB Output is correct
21 Correct 40 ms 24008 KB Output is correct
22 Correct 39 ms 23848 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 2 ms 600 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 0 ms 344 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 2 ms 348 KB Output is correct
39 Correct 1 ms 344 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 1 ms 344 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 1 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Incorrect 1 ms 344 KB Output isn't correct
47 Halted 0 ms 0 KB -