結果

問題 No.812 Change of Class
ユーザー akakimidoriakakimidori
提出日時 2019-04-12 21:44:33
言語 C
(gcc 13.3.0)
結果
AC  
実行時間 127 ms / 4,000 ms
コード長 2,267 bytes
コンパイル時間 353 ms
コンパイル使用メモリ 30,464 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-06-12 06:44:06
合計ジャッジ時間 4,570 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge5
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ファイルパターン 結果
sample AC * 3
other AC * 60
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 # 

#include<stdio.h>
#include<stdlib.h>
#include<stdint.h>
#include<inttypes.h>

typedef struct directed_edge {
  int32_t vertex;
  int32_t next;
} graph_edge;

typedef struct directedGraph {
  graph_edge *edge;
  int32_t *start;
  int32_t pointer;
  int32_t vertex_num;
  int32_t edge_max_size;
} graph;

graph* new_graph (const int vertex_num) {
  graph *g = (graph *) calloc (1, sizeof (graph));
  g->edge = (graph_edge *) calloc (1, sizeof (graph_edge));
  g->start = (int32_t *) calloc (vertex_num, sizeof (int32_t));
  g->pointer = 0;
  g->vertex_num = vertex_num;
  g->edge_max_size = 1;
  for (int32_t i = 0; i < vertex_num; ++i) {
    g->start[i] = -1;
  }
  return g;
}

void add_edge (graph *g, int32_t from, int32_t to) {
  if (g->pointer == g->edge_max_size) {
    g->edge_max_size *= 2;
    g->edge = (graph_edge *) realloc (g->edge, sizeof (graph_edge) * g->edge_max_size);
  }
  g->edge[g->pointer] = (graph_edge) {to, g->start[from]};
  g->start[from] = g->pointer++;
}

int32_t BFS_graph (graph *g, int32_t src, int32_t *res) {
  int32_t *q = (int32_t *) calloc (g->vertex_num, sizeof (int32_t));
  uint8_t *used = (uint8_t *) calloc (g->vertex_num, sizeof (uint8_t));
  int32_t *d = (int32_t *) calloc (g->vertex_num, sizeof (int32_t));
  int32_t front = 0;
  int32_t last = 0;
  used[src] = 1;
  q[last++] = src;
  while (front < last) {
    const int32_t v = q[front++];
    for (int32_t p = g->start[v]; p != -1; p = g->edge[p].next) {
      const int32_t u = g->edge[p].vertex;
      if (!used[u]) {
	used[u] = 1;
	q[last++] = u;
	d[u] = d[v] + 1;
      }
    }
  }
  *res = d[q[last - 1]];
  free(q);
  free(used);
  free (d);
  return last;
}

typedef int32_t i32;

void run (void) {
  i32 n, m;
  scanf ("%" SCNi32 "%" SCNi32, &n, &m);
  graph *g = new_graph (n);
  while (m--) {
    i32 a, b;
    scanf ("%" SCNi32 "%" SCNi32, &a, &b);
    a--;
    b--;
    add_edge (g, a, b);
    add_edge (g, b, a);
  }
  i32 q;
  scanf ("%" SCNi32, &q);
  while (q--) {
    i32 a;
    scanf ("%" SCNi32, &a);
    a--;
    i32 dd = 0;
    i32 ans = BFS_graph (g, a, &dd) - 1;
    i32 d = 1;
    i32 k = 0;
    while (d < dd) {
      d *= 2;
      k++;
    }
    printf ("%" PRIi32 " %" PRIi32 "\n", ans, k);
  }
}

int main (void) {
  run ();
  return 0;
}
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