#706657 (C) No.1718 Random Squirrel

• 問題: No.1718 Random Squirrel
• ユーザー: 👑 ygussany
• 提出日時: 2021-10-10 11:39:13
• 言語: C (gcc 12.3.0)
• 結果: WA
• 実行時間: -
• コード長: 2,202 bytes
• コンパイル時間: 162 ms
• コンパイル使用メモリ: 31,300 KB
• 実行使用メモリ: 19,164 KB
• 最終ジャッジ日時: 2023-10-24 11:32:40
• 合計ジャッジ時間: 2,485 ms
• ジャッジサーバーID （参考情報）: judge14 / judge12

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 6,172 KB
testcase_01	AC	2 ms; 6,172 KB
testcase_02	AC	2 ms; 6,172 KB
testcase_03	WA	-
testcase_04	AC	2 ms; 6,172 KB
testcase_05	WA	-
testcase_06	WA	-
testcase_07	WA	-
testcase_08	AC	2 ms; 6,172 KB
testcase_09	WA	-
testcase_10	WA	-
testcase_11	WA	-
testcase_12	WA	-
testcase_13	WA	-
testcase_14	WA	-
testcase_15	WA	-
testcase_16	WA	-
testcase_17	WA	-
testcase_18	WA	-
testcase_19	WA	-
testcase_20	WA	-
testcase_21	WA	-
testcase_22	WA	-
testcase_23	WA	-
testcase_24	WA	-
testcase_25	AC	55 ms; 8,208 KB
testcase_26	AC	30 ms; 8,208 KB
testcase_27	WA	-
testcase_28	AC	30 ms; 8,208 KB
testcase_29	WA	-
testcase_30	WA	-
testcase_31	AC	42 ms; 19,144 KB
testcase_32	WA	-

ソースコード

#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 u, int par[], int size[], int max_depth[], int ans[])
{
	int w, max[2] = {-1, -1};
	edge *p;
	for (p = adj[u], ans[u] = 0; p != NULL; p = p->next) {
		w = p->v;
		ans[u] += size[w];
		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] = ans[u] * 2 - max[0];
	
	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, w, par, size, max_depth, ans);
		} else if (max_depth[w] == max[0]) {
			size[u] -= size[w];
			size[w] += size[u];
			max_depth[u] = max[1] + 1;
			DFS(adj, w, par, size, max_depth, ans);
			size[w] -= size[u];
			size[u] += size[w];
		} else {
			size[u] -= size[w];
			size[w] += size[u];
			max_depth[u] = max[0] + 1;
			DFS(adj, w, par, size, max_depth, ans);
			size[w] -= size[u];
			size[u] += size[w];
		}
	}
}

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, 1, par, size, max_depth, ans);
	for (u = 1; u <= N; u++) printf("%d\n", ans[u]);
	fflush(stdout);
	return 0;
}