adding test longest consecutive sequence

labs/11_hash_tables/test_longest_consecutive_sequence.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+#include <vector>
+
+int longestConsecutive(std::vector<int>& nums) {
+}
+
+int main() {
+	//std::vector<int> nums = {100, 4, 200, 1, 3, 2};
+	std::vector<int> nums = {100, 4, 200, 1, 3, 2, 2, 2, 2, 3};
+	//std::vector<int> nums = {100, 4, 200, 1, 3, 2, 5, 6};
+	//std::vector<int> nums = {0,3,7,2,5,8,4,6,0,1};
+	//std::vector<int> nums = {100, 4, 200, 201, 202, 203, 205, 204, 1, 3, 2};
+	int size = nums.size();
+	std::cout<< "for vector {";
+	for(int i=0;i<size-1;i++){
+		std::cout<< nums[i] << ",";
+	}
+	std::cout<< nums[size-1] << "}" <<std::endl;
+	int length = longestConsecutive(nums);
+	std::cout << "The length of the longest consecutive sequence is: " << length << std::endl;
+	return 0;
+}