oj.uz

Submission #471702

# Submission time Handle Problem Language Result Execution time Memory
471702 2021-09-10T12:04:10 Z shrimb Mergers (JOI19_mergers) C++17
0 / 100
 211 ms 190832 KB 
#include"bits/stdc++.h"
#define int long long
#define endl '\n'
#define USACO(x) ifstream cin ((string)#x + ".in"); ofstream cout((string)#x + ".out")
using namespace std;
const int maxN = 1000001;
int n, k;
vector<int> adj[maxN];
int s[maxN];
int tot[maxN];
int subtree[maxN];

map<int,int>* s2b[maxN];
int cnt[maxN];
bool bad[maxN];

void inc (int a, int b, int v) {
    (*s2b[a])[b] += v;
    if ((*s2b[a])[b] == tot[b]) cnt[a]++;
}

int cunt = 0;

void dfs (int cur, int par) {
    subtree[cur] = 1;
    if (adj[cur].size() == 1 and cur != 1) {
        inc(cur, s[cur], 1);
        bad[cur] = (cnt[cur] == (int)((*s2b[cur]).size()));
        return;
    }
    int best = -1;
    for (int i : adj[cur]) {
        if (i != par) {
            dfs(i, cur);
            subtree[cur] += subtree[i];
            if (best == -1 or subtree[i] > subtree[best]) best = i;
        }
    }

    s2b[cur] = s2b[best];
    cnt[cur] = cnt[best];

    for (int i : adj[cur]) {
        if (i != par and i != best) {
            for (auto j : (*s2b[i])) {
                inc(cur, j.first, j.second);
            }
            (*s2b[i]).clear();
        }
    }

    inc(cur, s[cur], 1);
    bad[cur] = (cnt[cur] == (int)((*s2b[cur]).size()));
}

int calc_ans (int cur, int par) {
    int ret = 0;
    for (int i : adj[cur]) {
        if (i != par) {
            int x = calc_ans(i, cur);
            if (bad[cur] == 0 or cur == 1) {
                cunt += min(ret, x);
                // cerr << cunt << endl;
                ret = abs(ret - x);
            }
            else ret += x;
        }
    }
    if (ret == 0 and cur != 1) ret += bad[cur];
    return ret;
}


signed main() {
    for (auto& i : s2b) i = new map<int,int>();
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> k;
    for (int i = 1 ; i < n ; i++) {
        int a, b;
        cin >> a >> b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }

    for (int i = 1 ; i <= n ; i++) {
        cin >> s[i];
        tot[s[i]]++;
    }
    dfs(1, 0);
    // for (int i = 1 ; i <= n ; i++) cout << bad[i] << " "; cout << endl;
    int x = calc_ans(1, 0);
    cout << cunt + (x ? 1 + (x/2) : 0);


}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 94276 KB Output is correct
2 Correct 70 ms 94184 KB Output is correct
3 Correct 66 ms 94152 KB Output is correct
4 Correct 65 ms 94204 KB Output is correct
5 Correct 65 ms 94148 KB Output is correct
6 Correct 64 ms 94144 KB Output is correct
7 Runtime error 164 ms 190832 KB Execution killed with signal 11
8 Halted 0 ms 0 KB -

Subtask #2
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 94276 KB Output is correct
2 Correct 70 ms 94184 KB Output is correct
3 Correct 66 ms 94152 KB Output is correct
4 Correct 65 ms 94204 KB Output is correct
5 Correct 65 ms 94148 KB Output is correct
6 Correct 64 ms 94144 KB Output is correct
7 Runtime error 164 ms 190832 KB Execution killed with signal 11
8 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 94276 KB Output is correct
2 Correct 70 ms 94184 KB Output is correct
3 Correct 66 ms 94152 KB Output is correct
4 Correct 65 ms 94204 KB Output is correct
5 Correct 65 ms 94148 KB Output is correct
6 Correct 64 ms 94144 KB Output is correct
7 Runtime error 164 ms 190832 KB Execution killed with signal 11
8 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 147 ms 106060 KB Output is correct
2 Correct 211 ms 107584 KB Output is correct
3 Incorrect 68 ms 94496 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 64 ms 94276 KB Output is correct
2 Correct 70 ms 94184 KB Output is correct
3 Correct 66 ms 94152 KB Output is correct
4 Correct 65 ms 94204 KB Output is correct
5 Correct 65 ms 94148 KB Output is correct
6 Correct 64 ms 94144 KB Output is correct
7 Runtime error 164 ms 190832 KB Execution killed with signal 11
8 Halted 0 ms 0 KB -