結果

問題 No.1718 Random Squirrel
ユーザー 👑 ygussany
提出日時 2021-10-10 11:58:30
言語 C
(gcc 13.3.0)
結果
WA  
実行時間 -
コード長 2,508 bytes
コンパイル時間 168 ms
コンパイル使用メモリ 31,616 KB
実行使用メモリ 22,144 KB
最終ジャッジ日時 2024-09-23 03:51:59
合計ジャッジ時間 2,446 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1 WA * 1
other AC * 6 WA * 25
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <stdio.h>
typedef struct Edge {
    struct Edge *next;
    int v;
} edge;
void chmax(int* a, int b)
{
    if (*a < b) *a = b;
}
void DFS(edge* adj[], int D[], int u, int par[], int size[], int max_depth[], int ans[])
{
    int w, max[2] = {0, 0};
    edge *p;
    for (p = adj[u]; p != NULL; p = p->next) {
        w = p->v;
        if (max[0] < max_depth[w]) {
            max[1] = max[0];
            max[0] = max_depth[w];
        } else if (max[1] < max_depth[w]) max[1] = max_depth[w];
    }
    ans[u] = (size[u] - 1) * 2 - max[0];
    
    int tmp;
    for (p = adj[u]; p != NULL; p = p->next) {
        w = p->v;
        if (w == par[u]) continue;
        if (max_depth[w] == 0) {
            size[w] = size[u] + 1;
            max_depth[w] = max_depth[u] + 1;
            DFS(adj, D, w, par, size, max_depth, ans);
        } else if (max_depth[w] == max[0]) {
            if (max[1] != 0 || D[u] != 0) size[u] -= size[w];
            else size[u] = 0;
            size[w] += size[u];
            tmp = max_depth[u];
            max_depth[u] = max[1];
            if (max_depth[u] > 0) chmax(&(max_depth[w]), max_depth[u] + 1);
            DFS(adj, D, w, par, size, max_depth, ans);
            size[w] -= size[u];
            if (max[1] != 0 || D[u] != 0) size[u] += size[w];
            else size[u] = size[w] + 1;
            max_depth[u] = tmp;
        } else {
            size[u] -= size[w];
            size[w] += size[u];
            tmp = max_depth[u];
            max_depth[u] = max[0] + 1;
            max_depth[w] = max_depth[u] + 1;
            DFS(adj, D, w, par, size, max_depth, ans);
            size[w] -= size[u];
            size[u] += size[w];
            max_depth[u] = tmp;
        }
    }
}
int main()
{
    int i, N, K, u, w, D[100001] = {};
    edge *adj[100001] = {}, e[200001], *p;
    scanf("%d %d", &N, &K);
    for (i = 0; i < N - 1; i++) {
        scanf("%d %d", &u, &w);
        e[i*2].v = w;
        e[i*2+1].v = u;
        e[i*2].next = adj[u];
        e[i*2+1].next = adj[w];
        adj[u] = &(e[i*2]);
        adj[w] = &(e[i*2+1]);
    }
    for (i = 1; i <= K; i++) {
        scanf("%d", &u);
        D[u] = 1;
    }
    
    int par[100001] = {}, q[100001], head, tail;
    par[1] = 1;
    q[0] = 1;
    for (head = 0, tail = 1; head < tail; head++) {
        u = q[head];
        for (p = adj[u]; p != NULL; p = p->next) {
            w = p->v;
            if (par[w] == 0) {
                par[w] = u;
                q[tail++] = w;
            }
        }
    }
    
    int size[100001] = {}, max_depth[100001] = {};
    for (head--; head >= 0; head--) {
        u = q[head];
        if (size[u] == 0) size[u] += D[u];
        else size[u]++;
        if (u != 1) size[par[u]] += size[u];
        if (size[u] != 0) {
            chmax(&(max_depth[u]), 1);
            if (u != 1) chmax(&(max_depth[par[u]]), max_depth[u] + 1);
        }
    }
    
    int ans[100001];
    DFS(adj, D, 1, par, size, max_depth, ans);
    for (u = 1; u <= N; u++) printf("%d\n", ans[u]);
    fflush(stdout);
    return 0;
}
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