day 24: 36-valid-sudoku, 128-longest-consecutive-sequence

128-longest-consecutive-sequence/driver.cpp

@@ -0,0 +1,10 @@
+#include "soln.hpp"
+
+int main()
+{
+	vector<int> nums{100, 4, 200, 1, 3, 2};
+	int answer = 4;
+	Solution soln;
+	cout << "Found longest consecutive sequence correctly? " << soln.test(nums, answer) << endl;
+	return 0;
+}

128-longest-consecutive-sequence/soln.cpp

@@ -0,0 +1,27 @@
+#include "soln.hpp"
+
+int Solution::longestConsecutive(vector<int> &nums)
+{
+	if (nums.size() < 2)
+		return nums.size();
+	sort(nums.begin(), nums.end());
+	int max_len = 1, cur_max_len = 1;
+	for (int i = 1; i < nums.size(); i++)
+	{
+		if (nums[i] == nums[i - 1])
+			continue;
+		if ((nums[i] == nums[i - 1] + 1))
+			cur_max_len++;
+		else
+		{
+			max_len = max(cur_max_len, max_len);
+			cur_max_len = 1;
+		}
+	}
+	return max(max_len, cur_max_len);
+}
+
+bool Solution::test(vector<int> &nums, int answer)
+{
+	return longestConsecutive(nums) == answer;
+}

128-longest-consecutive-sequence/soln.hpp

@@ -0,0 +1,8 @@
+#include <bits/stdc++.h>
+using namespace std;
+class Solution
+{
+public:
+	int longestConsecutive(vector<int> &nums);
+	bool test(vector<int> &nums, int answer);
+};