oj.uz

Submission #171414

# Submission time Handle Problem Language Result Execution time Memory
171414 2019-12-28T15:55:51 Z kuroni Synchronization (JOI13_synchronization) C++17
50 / 100
 8000 ms 19612 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1E5 + 5, M = 2E5 + 5;

int n, m, q, d, u, f[N], g[N], ue[N], ve[N], lz[N], col[N];
int que[M];
bool chk[N], mod[N];
vector<int> adj[N], com[N];

void init() {
    for (int i = 1; i <= n; i++) {
        lz[i] = col[i] = 0;
        mod[i] = false;
        adj[i].clear(); com[i].clear();
    }
}

void DFS(int u, int p = 0) {
    col[u] = col[p];
    for (int &v : adj[u]) {
        int c = u ^ ue[v] ^ ve[v];
        if (c != p) {
            DFS(c, u);
        }
    }
}

void update(int u, int dif, int p = 0) {
    f[u] += dif; lz[u] += dif;
    for (int &v : com[u]) {
        int c = u ^ col[ue[v]] ^ col[ve[v]];
        if (!chk[v]) {
            g[v] += dif;
        } else if (c != p) {
            update(c, dif, u);
        }
    }
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> m >> q;
    fill(f + 1, f + n + 1, 1);
    for (int i = 1; i < n; i++) {
        cin >> ue[i] >> ve[i];
        g[i] = 2;
    }
    for (int i = 1; i <= m; i++) {
        cin >> que[i];
    }
    d = sqrt(m / 4 + 1);
    for (int bl = 1; bl <= m; bl += d) {
        init();
        for (int i = 0; i < d && bl + i <= m; i++) {
            mod[que[bl + i]] = true;
        }
        for (int i = 1; i < n; i++) {
            if (!mod[i] && chk[i]) {
                adj[ue[i]].push_back(i);
                adj[ve[i]].push_back(i);
            }
        }
        for (int i = 1; i <= n; i++) {
            if (col[i] == 0) {
                col[0] = i;
                DFS(i);
            }
        }
        for (int i = 1; i < n; i++) {
            if (mod[i]) {
                com[col[ue[i]]].push_back(i);
                com[col[ve[i]]].push_back(i);
            }
        }
        for (int i = 0; i < d && bl + i <= m; i++) {
            int e = que[bl + i];
            if (!chk[e]) {
                int sum = (f[col[ue[e]]] + f[col[ve[e]]] + g[e]) / 2;
                update(col[ue[e]], sum - f[col[ue[e]]]);
                update(col[ve[e]], sum - f[col[ve[e]]]);
                g[e] = 0;
            }
            chk[e] = !chk[e];
        }
        for (int i = 1; i <= n; i++) {
            f[i] = f[col[i]];
        }
        for (int i = 1; i < n; i++) {
            if (!mod[i] && !chk[i]) {
                g[i] += lz[col[ue[i]]] + lz[col[ve[i]]];
            }
        }
    }
    while (q--) {
        cin >> u;
        cout << f[u] << '\n';
    }
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 7 ms 5112 KB Output is correct
3 Correct 6 ms 5084 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 13 ms 5112 KB Output is correct
7 Correct 198 ms 5936 KB Output is correct
8 Correct 197 ms 6124 KB Output is correct
9 Correct 211 ms 6048 KB Output is correct
10 Execution timed out 8042 ms 14340 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3296 ms 17244 KB Output is correct
2 Correct 3407 ms 17204 KB Output is correct
3 Correct 2247 ms 19064 KB Output is correct
4 Correct 2230 ms 18980 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 10 ms 5240 KB Output is correct
7 Correct 145 ms 6108 KB Output is correct
8 Correct 5971 ms 14908 KB Output is correct
9 Correct 7478 ms 14864 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6953 ms 14860 KB Output is correct
2 Correct 2250 ms 19480 KB Output is correct
3 Correct 2299 ms 19612 KB Output is correct
4 Correct 2294 ms 19448 KB Output is correct

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 6 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 11 ms 5112 KB Output is correct
6 Correct 200 ms 6008 KB Output is correct
7 Execution timed out 8071 ms 14212 KB Time limit exceeded
8 Halted 0 ms 0 KB -