oj.uz

답안 #497083

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
497083 2021-12-22T10:43:04 Z Jarif_Rahman Unique Cities (JOI19_ho_t5) C++17
32 / 100
 1031 ms 94940 KB 
#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
const int k = 19;
const int inf = 1e8;

int n, m;
vector<int> C;
vector<vector<int>> v;
vector<vector<pair<int, int>>> anc;
vector<int> cnt;
vector<int> mxh;
vector<int> ans;

pair<int, int> next(int nd, int h){
    if(h == 0) return {nd, 0};
    for(int i = k-1; i >= 0; i--){
        if(anc[nd][i].sc <= h){
            h-=anc[nd][i].sc;
            auto nxt = next(anc[nd][i].f, h);
            nxt.sc+=anc[nd][i].sc;
            return nxt;
        }
    }
    return {anc[nd][0].f, anc[nd][0].sc};
}

void dfs0(int nd, int ss){
    for(int x: v[nd]) if(x != ss) dfs0(x, nd);
    int mx = 0, smx = 0, in = n;
    for(int x: v[nd]) if(x != ss){
        if(mxh[x] > mx) smx = mx, mx = mxh[x], in = x;
        else if(mxh[x] > smx) smx = mxh[x];
    }
    mxh[nd] = mxh[in]+1;
    auto nxt = next(in, smx);
    nxt.sc++;
    nxt.sc = min(nxt.sc, inf);
    anc[nd][0] = nxt;
    for(int i = 1; i < k; i++){
        anc[nd][i].f = anc[anc[nd][i-1].f][i-1].f;
        anc[nd][i].sc = anc[nd][i-1].sc + anc[anc[nd][i-1].f][i-1].sc;
        anc[nd][i].sc = min(anc[nd][i].sc, inf);
    }
    cnt[nd] = cnt[nxt.f]+1;
}

void dfs1(int nd, int ss){
    vector<pair<int, int>> sth;
    for(int x: v[nd]) sth.pb({mxh[x], x});
    sort(sth.rbegin(), sth.rend());
    while(sth.size() < 3) sth.pb({0, n});

    auto nxt = next(sth[0].sc, sth[1].f);
    ans[nd] = cnt[nxt.f];

    auto old_anc = anc[nd];
    int old_cnt = cnt[nd], old_mxh = mxh[nd];
    for(int x: v[nd]) if(x != ss){
        pair<int, int> nxt;
        if(x == sth[0].sc) nxt = next(sth[1].sc, sth[2].f), mxh[nd] = mxh[sth[1].sc]+1;
        else if(x == sth[1].sc) nxt = next(sth[0].sc, sth[2].f), mxh[nd] = mxh[sth[0].sc]+1;
        else nxt = next(sth[0].sc, sth[1].f), mxh[nd] = mxh[sth[0].sc]+1;

        nxt.sc++;
        nxt.sc = min(nxt.sc, inf);

        anc[nd][0] = nxt;
        for(int i = 1; i < k; i++){
            anc[nd][i].f = anc[anc[nd][i-1].f][i-1].f;
            anc[nd][i].sc = anc[nd][i-1].sc + anc[anc[nd][i-1].f][i-1].sc;
            anc[nd][i].sc = min(anc[nd][i].sc, inf);
        }
        cnt[nd] = cnt[nxt.f]+1;
        dfs1(x, nd);
    }
    anc[nd] = old_anc;
    cnt[nd] = old_cnt;
    mxh[nd] = old_mxh;
}


int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    C.resize(n);
    v.resize(n);
    anc.resize(n+1, vector<pair<int, int>>(k, {n, inf}));
    cnt.resize(n+1, 0);
    mxh.resize(n+1, 1);
    mxh[n] = 0;
    ans.resize(n);

    for(int i = 0; i < n-1; i++){
        int a, b; cin >> a >> b; a--, b--;
        v[a].pb(b);
        v[b].pb(a);
    }

    for(int &x: C) cin >> x;

    dfs0(0, -1);
    dfs1(0, -1);

    for(int x: ans) cout << x << "\n";
}

Subtask #1
0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 3 ms 716 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 195 ms 29860 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 287 ms 40560 KB Output is correct
2 Correct 946 ms 92148 KB Output is correct
3 Correct 75 ms 14040 KB Output is correct
4 Correct 369 ms 52172 KB Output is correct
5 Correct 1031 ms 94940 KB Output is correct
6 Correct 756 ms 70976 KB Output is correct
7 Correct 402 ms 52296 KB Output is correct
8 Correct 466 ms 61024 KB Output is correct
9 Correct 422 ms 58956 KB Output is correct
10 Correct 464 ms 56780 KB Output is correct
11 Correct 381 ms 53016 KB Output is correct
12 Correct 898 ms 84828 KB Output is correct
13 Correct 621 ms 68312 KB Output is correct
14 Correct 655 ms 77104 KB Output is correct
15 Correct 312 ms 54448 KB Output is correct
16 Correct 745 ms 77808 KB Output is correct
17 Correct 685 ms 71196 KB Output is correct

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 3 ms 716 KB Output isn't correct
3 Halted 0 ms 0 KB -