PHP

Generate Parentheses

class Solution {
	List<String> generateParentheses(int n) {
	    List<String> result = new ArrayList<>();
        if (n == 0) {
			String empty = "";
            result.add(empty);
        } 
		else {
            for (int closure = 0; closure < n; closure++)
                for (String left: generateParentheses(closure))
                    for (String right: generateParentheses(n - closure - 1))
                        result.add("(" + left + ")" + right);
        }
        return result;
	}
}

Generate Parentheses

/**
 * Note: The returned array must be malloced, assume caller calls free().
 */
char ** generateParenthesis(int n, int* returnSize){

}

Generate Parentheses

function generateParenthesis(n: number): string[] {

};

Generate Parentheses

public class Solution {
    public IList<string> GenerateParenthesis(int n) {
        
    }
}

Generate Parentheses

/**
 * @param {number} n
 * @return {string[]}
 */
var generateParenthesis = function(n) {
    
};

Generate Parentheses

class Solution {
    func generateParenthesis(_ n: Int) -> [String] {
        
    }
}

Generate Parentheses

class Solution {

    /**
     * @param Integer $n
     * @return String[]
     */
    function generateParenthesis($n) {
        
    }
}

Generate Parentheses

class Solution {
public:
    vector<string> generateParenthesis(int n) {
        
    }
};

Generate Parentheses

class Solution {
    public List<String> generateParenthesis(int n) {
        
    }
}

Generate Parentheses

# @param {Integer} n
# @return {String[]}
def generate_parenthesis(n)
    
end