Submission #1127867

#	Time	Username	Problem	Language	Result	Execution time	Memory
1127867		sleepntsheep	Room Temperature (JOI24_ho_t1)	C11	35 / 100	2 ms	328 KiB

Main

#include <stdio.h>
#include <limits.h>
#include <stdlib.h>

int compar(const void *i, const void *j)
{
  return *(int*)i - *(int*)j;
}

void *ptr;

int compar_(const void *i, const void *j)
{
  int *a;
  a = ptr;
  return a[*(int*)i] - a[*(int*)j];
}

void chmin(int *a, int b)
{
  if (b < *a)
  {
    *a = b;
  }
}

int main()
{
  int n, t, i, min, range;
  static int a[1 << 19], b[1 << 19], c[1 << 19];

  min   = INT_MAX;
  range = INT_MAX;

  scanf("%d%d", &n, &t);
  for (i = 0; i < n; ++i)
  {
    scanf("%d", a + i);
    c[i] = a[i] % t;
    b[i] = i;
    if (min > a[i])
    {
      min = a[i];
    }
  }

  ptr = c;

  qsort(b, n, sizeof *b, compar_);

  for (i = 0; i < n; ++i)
  {
    if (c[b[i]] <= min)
    {
      if (i)
      {
        chmin(&range, t + c[b[i - 1]] - c[b[i]]);
      }
      else
      {
        chmin(&range, c[b[n - 1]] - c[b[0]]);
      }
    }
  }

  printf("%d\n", (range + 1) / 2);






  return 0;
}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:35:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |   scanf("%d%d", &n, &t);
      |   ^~~~~~~~~~~~~~~~~~~~~
Main.c:38:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |     scanf("%d", a + i);
      |     ^~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 15
• Subtask 2: 5 / 5
• Subtask 3: 30 / 30
• Subtask 4: 0 / 35
• Subtask 5: 0 / 15