Write, efficient code for extracting unique elements from
a sorted list of array.
e.g. (1, 1, 3, 3, 3, 5, 5, 5, 9, 9, 9, 9) -> (1, 3, 5, 9).
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Answer Posted / john
int a[] = { 1, 3, 1, 5, 1, 9, 4, 1, 3, 2, 3, 9 };
int* b;
int i = 0;
int max = 0;
int size = sizeof(a)/sizeof(int);
//find biggest element in array
for(; i < size; i++){
if(a[i] > max)
max = a[i];
}
//fill b with 0's
b = malloc(max*sizeof(int));
for(i = 0; i < max; i++){
b[i] = 0;
}
//use b to check for duplicates
for(i = 0; i < 12; i++){
b[a[i]]++;
if(b[a[i]] == 1)
printf("%d\n", a[i]);
}
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