डुप्लिकेट हटाएँ

इनपुट:
std::vector<long long> numbers = {3, 1, 3, 2, 1};

अपेक्षित आउटपुट:
std::vector<long long> expected = {3, 1, 2};

इनपुट:
long[] numbers = new long[] {3, 1, 3, 2, 1};

अपेक्षित आउटपुट:
long[] expected = new long[] {3, 1, 2};

इनपुट:
std::vector<long long> numbers = {7, 7, 7};

अपेक्षित आउटपुट:
std::vector<long long> expected = {7};

इनपुट:
long[] numbers = new long[] {7, 7, 7};

अपेक्षित आउटपुट:
long[] expected = new long[] {7};