oj.uz

Submission #252350

# Submission time Handle Problem Language Result Execution time Memory
252350 2020-07-25T11:06:01 Z IgorI Synchronization (JOI13_synchronization) C++17
20 / 100
 4584 ms 19316 KB 
const int LG = 21;
const int N = 200005;
const long long MOD = 1e9 + 7;
const long long INF = 1e9;
const long long INFLL = 1e18;

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<ll> vll;

#define forn(i, n) for (int (i) = 0; (i) != (n); (i)++)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define popcount(x) __builtin_popcount(x)
#define popcountll(x) __builtin_popcountll(x)
#define fi first
#define se second
#define re return
#define pb push_back
#define uniq(x) sort(all(x)); (x).resize(unique(all(x)) - (x).begin())

#ifdef LOCAL
#define dbg(x) cerr << __LINE__ << " " << #x << " " << x << endl
#define ln cerr << __LINE__ << endl
#else
#define dbg(x) void(0)
#define ln void(0)
#endif // LOCAL

int n, m, q;

int Get(int pos, vector<int> &tree, int L = 0, int R = n, int V = 0)
{
    if (tree[V] != -1)
    {
        return tree[V];
    }
    int M = (L + R) / 2;
    if (pos < M) return Get(pos, tree, L, M, 2 * V + 1);
    else return Get(pos, tree, M, R, 2 * V + 2);
}

void Set(int l, int r, int x, vector<int> &tree, int L = 0, int R = n, int V = 0)
{
    if (r <= L || R <= l)
    {
        return;
    }
    if (l <= L && R <= r)
    {
        tree[V] = x;
        return;
    }
    int M = (L + R) / 2;
    if (tree[V] != -1) tree[2 * V + 1] = tree[V];
    if (tree[V] != -1) tree[2 * V + 2] = tree[V];
    tree[V] = -1;
    Set(l, r, x, tree, L, M, 2 * V + 1);
    Set(l, r, x, tree, M, R, 2 * V + 2);
}

int Get2(int pos, vector<int> &tree, int L = 0, int R = n - 1, int V = 0)
{
    if (L + 1 == R)
    {
        return tree[V];
    }
    int M = (L + R) / 2;
    if (pos < M) return Get2(pos, tree, L, M, 2 * V + 1);
    else return Get2(pos, tree, M, R, 2 * V + 2);
}

void Set2(int pos, int x, vector<int> &tree, int L = 0, int R = n - 1, int V = 0)
{
    if (L + 1 == R)
    {
        tree[V] = x;
        return;
    }
    int M = (L + R) / 2;
    if (pos < M) Set2(pos, x, tree, L, M, 2 * V + 1);
    else Set2(pos, x, tree, M, R, 2 * V + 2);
    tree[V] = tree[2 * V + 1] + tree[2 * V + 2];
}

int FirstZero(int l, int r, vector<int> &tree, int L = 0, int R = n - 1, int V = 0)
{
    if (r <= L || R <= l)
    {
        return r;
    }
    if (l <= L && R <= r)
    {
        if (tree[V] == R - L) return r;
        if (L + 1 == R) return L;
        int M = (L + R) / 2;
        if (tree[2 * V + 1] == M - L) return FirstZero(l, r, tree, M, R, 2 * V + 2);
        else return FirstZero(l, r, tree, L, M, 2 * V + 1);
    }
    if (tree[V] == R - L) return r;
    int M = (L + R) / 2;
    int a = FirstZero(l, r, tree, L, M, 2 * V + 1);
    if (a != r) return a;
    return FirstZero(l, r, tree, M, R, 2 * V + 2);
}

int LastZero(int l, int r, vector<int> &tree, int L = 0, int R = n - 1, int V = 0)
{
    if (r <= L || R <= l)
    {
        return l - 1;
    }
    if (l <= L && R <= r)
    {
        if (tree[V] == R - L) return l - 1;
        if (L + 1 == R) return L;
        int M = (L + R) / 2;
        if (tree[2 * V + 2] == R - M) return LastZero(l, r, tree, L, M, 2 * V + 1);
        else return LastZero(l, r, tree, M, R, 2 * V + 2);
    }
    if (tree[V] == R - L) return r;
    int M = (L + R) / 2;
    int a = LastZero(l, r, tree, M, R, 2 * V + 2);
    if (a != l - 1) return a;
    return LastZero(l, r, tree, L, M, 2 * V + 1);;
}

void solve_line()
{
    vector<int> le(4 * n, -1), ri(4 * n, -1);
    for (int i = 0; i < n; i++)
    {
        Set(i, i + 1, i, le);
        Set(i, i + 1, i, ri);
    }
    vector<int> act(4 * n, 0);
    for (int i = 0; i < m; i++)
    {
        int z;
        cin >> z;
        z--;
        if (Get2(z, act))
        {
            Set2(z, 0, act);
            continue;
        }
        Set2(z, 1, act);
        int r = FirstZero(z, n - 1, act);
        int l = LastZero(0, z, act);
        l++;
        Set(l, r + 1, Get(z + 1, ri), ri);
        Set(l, r + 1, Get(z, le), le);
    }
    vector<int> ans(n);
    for (int i = 0; i < n; i++)
    {
        ans[i] = Get(i, ri) - Get(i, le) + 1;
    }
    for (int i = 0; i < q; i++)
    {
        int v;
        cin >> v;
        v--;
        cout << ans[v] << "\n";
    }
}

int dfs(int v, int p, int t, vvi &graph, vi &x, vi &y, vector<vector<pii> > &act)
{
    int res = 1;
    for (auto i : graph[v])
    {
        int u = x[i] + y[i] - v;
        if (u != p)
        {
            int L = -1, R = act[i].size();
            while (L + 1 < R)
            {
                int M = (L + R) / 2;
                if (act[i][M].first <= t)
                    L = M;
                else
                    R = M;
            }
            if (L == -1) continue;
            int T = min(act[i][L].second, t);
            res += dfs(u, v, T, graph, x, y, act);
        }
    }
    return res;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n >> m >> q;
    vector<int> x(n - 1), y(n - 1);
    vector<vector<int> > graph(n);
    int line = 1;
    for (int i = 0; i < n - 1; i++)
    {
        cin >> x[i] >> y[i];
        x[i]--, y[i]--;
        if (x[i] != i || y[i] != i + 1) line = 0;
        graph[x[i]].push_back(i);
        graph[y[i]].push_back(i);
    }
    if (line)
    {
        solve_line();
        return 0;
    }
    vector<int> fr(n - 1, -1);
    vector<vector<pii> > act(n - 1);
    for (int i = 0; i < m; i++)
    {
        int z;
        cin >> z;
        z--;
        if (fr[z] == -1)
        {
            fr[z] = i;
        }
        else
        {
            act[z].push_back({fr[z], i});
            fr[z] = -1;
        }
    }
    for (int i = 0; i < n - 1; i++)
    {
        if (fr[i] != -1)
        {
            act[i].push_back({fr[i], m});
        }
    }
    for (int i = 0; i < q; i++)
    {
        int v;
        cin >> v;
        v--;
        cout << dfs(v, v, m, graph, x, y, act) << "\n";
    }
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 7 ms 1536 KB Output is correct
8 Correct 6 ms 1536 KB Output is correct
9 Correct 7 ms 1536 KB Output is correct
10 Correct 84 ms 12280 KB Output is correct
11 Correct 82 ms 12280 KB Output is correct
12 Incorrect 302 ms 11848 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 19316 KB Output is correct
2 Correct 64 ms 16376 KB Output is correct
3 Correct 204 ms 11640 KB Output is correct
4 Correct 208 ms 11768 KB Output is correct

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 331 ms 11896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 3 ms 512 KB Output is correct
6 Correct 95 ms 1600 KB Output is correct
7 Correct 4584 ms 12716 KB Output is correct
8 Incorrect 323 ms 11928 KB Output isn't correct
9 Halted 0 ms 0 KB -