제출 #949785

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
949785	2024-03-19 17:37:27	rainboy	양말 찾기 (KPI13_socks)	C11	0 / 1	2468 ms	65536 KiB

socks

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#include <stdio.h>
#define L 31  /* L = ceil(log2(2 * 10^9 + 1)) */
int main() {
  static int xx[L];
  int n, l, a, b, x, tmp;
  scanf("%d", &n);
  x = 0;
  while (n--) {
    scanf("%d", &a);
    x ^= a;
    for (l = 0; l < L; l++)
      if ((a & 1 << l) != 0)
        xx[l] ^= a;
  }
  a = 0, b = x;
  for (l = 0; l < L; l++)
    if (xx[l] != 0 && xx[l] != x) {
      a = xx[l], b = x ^ xx[l];
      break;
    }
  if (a > b)
    tmp = a, a = b, b = tmp;
  printf("%d %d\n", a, b);
  return 0;
}
 
 
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컴파일 시 표준 에러 (stderr) 메시지

socks.c: In function 'main':
socks.c:9:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
socks.c:12:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |   scanf("%d", &a);
      |   ^~~~~~~~~~~~~~~

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