oj.uz

답안 #973544

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
973544 2024-05-02T07:01:32 Z efedmrlr Unique Cities (JOI19_ho_t5) C++17
4 / 100
 1341 ms 274432 KB 
// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>

using namespace std;


#define lli long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int i = 0; (i) < (n); (i)++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()


void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e9+500;
const int N = 3e5+5;
const int ALPH = 26;
const int LGN = 25;
constexpr int MOD = 1e9+7;
int n = 0, m = 0;
int D1 = 0, D2 = 0;
vector<int> t(N, 0);
vector<vector<int> > adj(N, vector<int>());
vector<vector<int> > mxsub;
vector<int> res(N, 0), dep, mxs;
vector<int> stck;
vector<int> freq;
int ans;
array<int, 2> get_far(int node, int par, int dist = 0) {
    array<int, 2> ret = {dist, node};
    for(auto c : adj[node]) {
        if(c == par) continue;
        ret = max(ret, get_far(c, node, dist + 1));
    }   
    return ret;
}

void pop_el() {
    freq[t[stck.back()]]--;
    if(freq[t[stck.back()]] == 0) ans--;
    stck.pop_back();
}
void add_el(int x) {
    freq[t[x]]++;
    stck.pb(x);
    if(freq[t[x]] == 1) ans++;
}

int prec(int node, int par) {
    array<array<int, 2>, 2> mx;
    mx[0] = {0, 0}; mx[1] = {0, 0};
    for(auto c : adj[node]) {
        if(c == par) continue;
        dep[c] = dep[node] + 1;
        int ret = prec(c, node);
        if(ret > mx[0][0]) {
            swap(mx[0], mx[1]);
            mx[0] = {ret, c};
        }
        else if(ret > mx[1][0]) {
            mx[1] = {ret, c};
        }
    }
    int ind = -1;
    for(int i = 0; i < adj[node].size(); i++) {
        if(adj[node][i] == par) continue;
        if(mx[0][1] == adj[node][i]) {
            mxsub[node][i] = mx[1][0];
            ind = i;
        }
        else {
            mxsub[node][i] = mx[0][0];
        }
    }
    if(ind != -1) {
        swap(mxsub[node][ind], mxsub[node][mxsub[node].size() - 1]);
        swap(adj[node][ind], adj[node][adj[node].size() - 1]);
    }
    mxs[node] = mx[0][0];
    return mx[0][0] + 1;
}

void dfs(int node, int par) {
    // cout << "node:" << node << "\n";
    vector<int> tmp(0);
    while(stck.size() && dep[stck.back()] >= dep[node] - mxs[node]) {
        tmp.pb(stck.back());
        pop_el();
    }
    res[node] = max(res[node], ans);
    // cout << "stck:";
    // for(auto c : stck) cout << c << " ";
    // cout << "\n";
    add_el(node);
    for(int i = 0; i < adj[node].size() - 1; i++) {
        auto c = adj[node][i];
        if(c == par) continue;
        dfs(c, node);
        
    }
    pop_el();
    int last = 0;
    if(mxsub[node].size() > 1 || par == 0) last = mxsub[node].back();

    while(tmp.size() && dep[tmp.back()] < dep[node] - last) {
        add_el(tmp.back());
        tmp.pop_back();
    }
    add_el(node);
    if(mxsub[node].size() > 1 || par == 0) {
        dfs(adj[node].back(), node);
    }
    pop_el();
    while(tmp.size()) {
        add_el(tmp.back());
        tmp.pop_back();
    }

}

void find_res(int rt) {
    mxsub.assign(n + 1, vector<int>());
    dep.assign(n + 1, 0);
    stck.clear();
    mxs.assign(n + 1, 0);
    freq.assign(n + 1, 0);
    ans = 0;
    for(int i = 1; i <= n; i++) {
        mxsub[i].resize(adj[i].size());
    }
    prec(rt, 0);
    dfs(rt, 0);
}

inline void solve() {
    cin>>n>>m;
    REP(i, n - 1) {
        int u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }
    for(int i = 1; i <= n; i++) {
        cin >> t[i];
    }
    D1 = get_far(1, 0)[1];
    D2 = get_far(D1, 0)[1];
    // cout << D1 << " " << D2 << "\n";
    find_res(D1);
    find_res(D2);
    for(int i = 1; i <= n; i++) {
        cout << res[i] << "\n";
    }
}
 
signed main() {

    fastio();
    int test = 1;
    //cin>>test;
    while(test--) {
        solve();
    }
    
}

Compilation message

joi2019_ho_t5.cpp: In function 'int prec(int, int)':
joi2019_ho_t5.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |     for(int i = 0; i < adj[node].size(); i++) {
      |                    ~~^~~~~~~~~~~~~~~~~~
joi2019_ho_t5.cpp: In function 'void dfs(int, int)':
joi2019_ho_t5.cpp:103:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |     for(int i = 0; i < adj[node].size() - 1; i++) {
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 9820 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 10 ms 11096 KB Output is correct
4 Correct 10 ms 10844 KB Output is correct
5 Correct 5 ms 10076 KB Output is correct
6 Correct 25 ms 15452 KB Output is correct
7 Correct 9 ms 11096 KB Output is correct
8 Correct 5 ms 10076 KB Output is correct
9 Correct 4 ms 10076 KB Output is correct
10 Correct 5 ms 9952 KB Output is correct
11 Correct 5 ms 10076 KB Output is correct
12 Correct 4 ms 10076 KB Output is correct
13 Correct 22 ms 14824 KB Output is correct
14 Correct 7 ms 10332 KB Output is correct
15 Correct 7 ms 10332 KB Output is correct
16 Correct 5 ms 10072 KB Output is correct
17 Correct 15 ms 12636 KB Output is correct
18 Correct 13 ms 10988 KB Output is correct
19 Correct 5 ms 10076 KB Output is correct
20 Correct 29 ms 15600 KB Output is correct
21 Correct 11 ms 11100 KB Output is correct
22 Correct 4 ms 10076 KB Output is correct
23 Correct 4 ms 9948 KB Output is correct
24 Correct 5 ms 10072 KB Output is correct
25 Correct 4 ms 10076 KB Output is correct
26 Correct 4 ms 10076 KB Output is correct
27 Correct 15 ms 12376 KB Output is correct
28 Correct 13 ms 11864 KB Output is correct
29 Correct 8 ms 10588 KB Output is correct
30 Correct 4 ms 10076 KB Output is correct
31 Correct 15 ms 12864 KB Output is correct
32 Correct 11 ms 11100 KB Output is correct

Subtask #2
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 110 ms 22868 KB Output is correct
2 Runtime error 1088 ms 274432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 193 ms 28552 KB Output is correct
2 Runtime error 1341 ms 274432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 9820 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 10 ms 11096 KB Output is correct
4 Correct 10 ms 10844 KB Output is correct
5 Correct 5 ms 10076 KB Output is correct
6 Correct 25 ms 15452 KB Output is correct
7 Correct 9 ms 11096 KB Output is correct
8 Correct 5 ms 10076 KB Output is correct
9 Correct 4 ms 10076 KB Output is correct
10 Correct 5 ms 9952 KB Output is correct
11 Correct 5 ms 10076 KB Output is correct
12 Correct 4 ms 10076 KB Output is correct
13 Correct 22 ms 14824 KB Output is correct
14 Correct 7 ms 10332 KB Output is correct
15 Correct 7 ms 10332 KB Output is correct
16 Correct 5 ms 10072 KB Output is correct
17 Correct 15 ms 12636 KB Output is correct
18 Correct 13 ms 10988 KB Output is correct
19 Correct 5 ms 10076 KB Output is correct
20 Correct 29 ms 15600 KB Output is correct
21 Correct 11 ms 11100 KB Output is correct
22 Correct 4 ms 10076 KB Output is correct
23 Correct 4 ms 9948 KB Output is correct
24 Correct 5 ms 10072 KB Output is correct
25 Correct 4 ms 10076 KB Output is correct
26 Correct 4 ms 10076 KB Output is correct
27 Correct 15 ms 12376 KB Output is correct
28 Correct 13 ms 11864 KB Output is correct
29 Correct 8 ms 10588 KB Output is correct
30 Correct 4 ms 10076 KB Output is correct
31 Correct 15 ms 12864 KB Output is correct
32 Correct 11 ms 11100 KB Output is correct
33 Correct 110 ms 22868 KB Output is correct
34 Runtime error 1088 ms 274432 KB Execution killed with signal 9
35 Halted 0 ms 0 KB -