Submission #550658

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
550658	2022-04-18 19:11:48	rainboy	여별 열쇠 (JOI15_keys)	C11	100 / 100	1 ms	340 KiB

keys

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#include <stdio.h>
#define N 2000
#define INF 0x3f3f3f3f
int min(int a, int b) { return a < b ? a : b; }
unsigned int X = 12345;
int rand_() {
  return (X *= 3) >> 1;
}
int xx[N * 2], xx_[N * 2], yy[N * 2];
void sort(int *ii, int l, int r) {
  while (l < r) {
    int i = l, j = l, k = r, i_ = ii[l + rand_() % (r - l)], tmp;
    while (j < k)
      if (xx[ii[j]] == xx[i_])
        j++;
      else if (xx[ii[j]] < xx[i_]) {
        tmp = ii[i], ii[i] = ii[j], ii[j] = tmp;
        i++, j++;
      } else {
        k--;
        tmp = ii[j], ii[j] = ii[k], ii[k] = tmp;
      }
    sort(ii, l, i);
 
 
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Compilation message (stderr)

keys.c: In function 'main':
keys.c:39:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%d%d%d", &n, &m, &k), k = n - k;
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
keys.c:41:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |   scanf("%d", &xx[i]);
      |   ^~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 90 / 90