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#include<stdio.h>
size_t complete_day(int *arr,size_t sz)
{
size_t count = 0;
for(size_t i = 0; i < sz-1; ++i)
for(size_t j = i+1; j < sz; ++j)
if((arr[i] + arr[j]) % 24 == 0) count++;
return count;
}
int main(void)
{
int arr1[] = {12,12,30,24,24};
int arr2[] = {72,48,24,55};
int arr3[] = {12,18,24};
size_t sz1 = 5,sz2 = 4,sz3 = 3;
printf("%zu\n",complete_day(arr1,sz1));
printf("%zu\n",complete_day(arr2,sz2));
printf("%zu\n",complete_day(arr3,sz3));
return 0;
}
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