Submission #531898

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
531898	2022-03-01 20:50:21	rainboy	Synchronization (JOI13_synchronization)	C11	100 / 100	2054 ms	140228 KiB

synchronization

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#include <stdio.h>
#include <stdlib.h>
#define N 100000
#define M 200000
#define LG  18  /* LG = ceil(log2(M)) */
#define N_  (1 + M * 2 * (LG * 2 + 3))
unsigned int X = 12345;
int rand_() {
  return (X *= 3) >> 1;
}
int ij[N - 1];
int *eh[N], eo[N], *eg[N - 1], eo_[N - 1], n, k;
void append(int **eh, int *eo, int i, int h) {
  int o = eo[i]++;
  if (o >= 2 && (o & o - 1) == 0)
    eh[i] = (int *) realloc(eh[i], o * 2 * sizeof *eh[i]);
  eh[i][o] = h;
}
void delete(int i, int h) {
  int o;
  for (o = eo[i]; o--; )
    if (eh[i][o] == h) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

synchronization.c: In function 'append':
synchronization.c:21:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   21 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
synchronization.c: In function 'main':
synchronization.c:216:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  216 |  scanf("%d%d%d", &n, &k, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
synchronization.c:220:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  220 |   scanf("%d%d", &i, &j), i--, j--;
      |   ^~~~~~~~~~~~~~~~~~~~~
synchronization.c:227:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  227 |   scanf("%d", &h), h--;
      |   ^~~~~~~~~~~~~~~
synchronization.c:233:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
  233 |   scanf("%d", &i), i--;
      |   ^~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 10 / 10
• Subtask 4: 20 / 20
• Subtask 5: 40 / 40