Problem
Solution
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Remove Duplicates from a Vector
Certification: Intermediate Level
Accuracy: 66.67%
Submissions: 3
Points: 10
Write a C++ program that removes duplicates from a vector using the STL 'set'.
Example 1
- Input: {1, 2, 2, 3, 3, 3}
- Output: {1, 2, 3}
- Explanation:
- Step 1: Create a vector with the input elements.
- Step 2: Create a set from the vector elements (duplicates are automatically removed).
- Step 3: Convert the set back to a vector or use it directly.
- Step 4: Return or display the result with duplicates removed.
Example 2
- Input: {5, 5, 5, 5, 5}
- Output: {5}
- Explanation:
- Step 1: Create a vector with the input elements.
- Step 2: Create a set from the vector elements (duplicates are automatically removed).
- Step 3: Convert the set back to a vector or use it directly.
- Step 4: Return or display the result with duplicates removed.
Constraints
- 1 ≤ size of vector ≤ 10^6
- Elements of the vector are integers within the range [-10^9, 10^9]
- Time Complexity: O(n log n), where n is the size of the vector
- Space Complexity: O(n)
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Solution Hints
- Use a `set` to store unique elements from the vector.
- Insert all elements of the vector into the set.
- Convert the set back to a vector.