5 views
23 Jan 2026
Task: swap a[i] and a[j] in an int array....
5 views
23 Jan 2026
Task: create and return a new array copy without using Arrays.copyOf....
4 views
23 Jan 2026
Task: return first index of target in array, else -1....
4 views
23 Jan 2026
Task: return how many times target appears in array....
5 views
23 Jan 2026
Task: return minimum value from non-empty array....
6 views
23 Jan 2026
Task: reverse elements between l and r inclusive....
5 views
23 Jan 2026
Task: remove all occurrences of val in-place and return new length (order can change)....
5 views
23 Jan 2026
Task: merge a and b alternately into a new array. Extra tail should be appended at end....
27 views
23 Jan 2026
Task: return prefix sums where pref[i] = sum of a[0..i]....
5 views
23 Jan 2026
Task: assume there is a majority element (> n/2). Return it using O(1) space....
3 views
23 Jan 2026
Task: return unique intersection of a and b....
4 views
23 Jan 2026
Task: given positive integers, return min length subarray with sum >= target. If not found return 0....
5 views
23 Jan 2026
Task: place negative numbers first then non-negative, keeping relative order inside each group....
5 views
23 Jan 2026
Task: return number of inversions in array using merge sort....
8 views
23 Jan 2026
Task: return array where res[i] = product of all elements except a[i] (no division)....
