Submission #917347

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
917347	2024-01-27 22:38:52	rainboy	산만한 고양이 (KOI17_cat)	C++17	100 / 100	254 ms	43068 KiB

cat

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 300000
#define j1  J1  /* hahaha */
int n, m;
int *ej[N], eo[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;
}
int pp[N], dd[N], i1, j1, i2, j2;
void dfs(int p, int i, int d) {
  int o;
  pp[i] = p, dd[i] = d++;
  for (o = eo[i]; o--; ) {
    int j = ej[i][o];
    if (j != p) {
      if (!dd[j])
        dfs(i, j, d + 1);
 
 
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Compilation message (stderr)

cat.cpp: In function 'void append(int, int)':
cat.cpp:14:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   14 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
cat.cpp: In function 'int main()':
cat.cpp:89:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |  scanf("%d%d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~
cat.cpp:93:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |   scanf("%d%d", &i, &j), i--, j--;
      |   ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 10 / 10
• Subtask 3: 23 / 23
• Subtask 4: 55 / 55