Submission #745245

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
745245	2023-05-19 15:42:20	rainboy	Hotspot (NOI17_hotspot)	C11	100 / 100	652 ms	1108 KiB

hotspot

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#include <stdio.h>
#include <stdlib.h>
#define N 5000
#define M 40000
#define K 2000
int *ej[N], eo[N], n;
void append(int i, int j) {
  int o = eo[i]++;
  if (o >= 2 && (o & o - 1) == 0)
    ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
  ej[i][o] = j;
}
void bfs(int *dd, int *kk, int s) {
  static int qu[N];
  int cnt, h, i, j, d, o;
  for (i = 0; i < n; i++)
    dd[i] = n;
  cnt = 0;
  dd[s] = 0, kk[s] = 1, qu[cnt++] = s;
  for (h = 0; h < cnt; h++) {
    i = qu[h], d = dd[i] + 1;
    for (o = eo[i]; o--; ) {
      j = ej[i][o];
      if (dd[j] > d)
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

hotspot.c: In function 'append':
hotspot.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
hotspot.c: In function 'main':
hotspot.c:53:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |  scanf("%d%d", &n, &m);
      |  ^~~~~~~~~~~~~~~~~~~~~
hotspot.c:57:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |   scanf("%d%d", &i, &j);
      |   ^~~~~~~~~~~~~~~~~~~~~
hotspot.c:60:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   60 |  scanf("%d", &k);
      |  ^~~~~~~~~~~~~~~
hotspot.c:62:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |   scanf("%d%d", &s, &t);
      |   ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 11 / 11
• Subtask 4: 18 / 18
• Subtask 5: 26 / 26
• Subtask 6: 36 / 36