Key pair.py

# User function Template for python3
class Solution:
    def hasArrayTwoCandidates(self, arr, n, x):
        dic = {}

        for i in arr:
            if i in dic:
                dic[i] += 1
            else:
                dic[i] = 1

        for i in arr:
            if x - i in dic:
                if x - i == i:
                    if dic[i] - 1 > 0:
                        return True
                else:
                    continue
                return True

        return False


# {
# Driver Code Starts
# Initial Template for Python 3


if __name__ == "__main__":
    tc = int(input())
    while tc > 0:
        n, x = list(map(int, input().strip().split()))
        arr = list(map(int, input().strip().split()))
        ob = Solution()
        ans = ob.hasArrayTwoCandidates(arr, n, x)
        if ans:
            print("Yes")
        else:
            print("No")
        tc -= 1


class Solution:
    def hasArrayTwoCandidates(self, arr, n, x):
        dic = {}

        for i in arr:
            if i in dic:
                dic[i] += 1
            else:
                dic[i] = 1

        for i in arr:
            if x - i in dic:
                if x - i == i:
                    if dic[i] - 1 > 0:
                        return True
                else:
                    continue
                return True

        return False


if __name__ == "__main__":
    tc = int(input())
    while tc > 0:
        n, x = list(map(int, input().strip().split()))
        arr = list(map(int, input().strip().split()))
        ob = Solution()
        ans = ob.hasArrayTwoCandidates(arr, n, x)
        if ans:
            print("Yes")
        else:
            print("No")
        tc -= 1
# } Driver Code Ends