Added 21.02. and 22.02.

Author: josipmaric

RemoveCoveredIntervals/main.cpp renamed to 20_02_2022_RemoveCoveredIntervals/main.cpp

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+//
+//  main.cpp
+//  AlgorithmADay
+//
+//  Created by josipmaric on 21.02.2022..
+//
+
+int majorityElement(vector<int>& nums) {
+    unordered_map<int, int> occurences;
+
+    if(nums.size() == 1) {
+        return nums[0];
+    }
+
+    for(int i = 0; i < nums.size(); i++) {
+        auto it = occurences.find(nums[i]);
+        if (it == occurences.end() ) {
+            occurences.insert ( std::pair<int,int>(nums[i], 1) );
+        } else {
+            it->second += 1;
+            if(it->second > nums.size()/2) {
+                return nums[i];
+            }
+        }
+    }
+
+    return 0;
+}

RemoveCoveredIntervals/text.txt renamed to 20_02_2022_RemoveCoveredIntervals/text.txt

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+Given an array nums of size n, return the majority element.
+
+The majority element is the element that appears more than ⌊n / 2⌋ times. You may assume that the majority element always exists in the array.
+
+ 
+
+Example 1:
+
+Input: nums = [3,2,3]
+Output: 3
+Example 2:
+
+Input: nums = [2,2,1,1,1,2,2]
+Output: 2
+ 
+
+Constraints:
+
+n == nums.length
+1 <= n <= 5 * 104
+-231 <= nums[i] <= 231 - 1

21_02_2022_MajoritiElement/main.cpp

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+//
+//  main.cpp
+//  AlgorithmADay
+//
+//  Created by josipmaric on 22.02.2022..
+//
+
+int titleToNumber(string columnTitle) {
+    int number = 0;
+    for (int i = 0; i < columnTitle.size(); i++) {
+        int currentLetter = (int) columnTitle[i] - 64;
+        number = number * 26 + currentLetter;
+    }
+    return number;
+}

21_02_2022_MajoritiElement/text.txt

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+Given a string columnTitle that represents the column title as appear in an Excel sheet, return its corresponding column number.
+
+For example:
+
+A -> 1
+B -> 2
+C -> 3
+...
+Z -> 26
+AA -> 27
+AB -> 28 
+...
+ 
+
+Example 1:
+
+Input: columnTitle = "A"
+Output: 1
+Example 2:
+
+Input: columnTitle = "AB"
+Output: 28
+Example 3:
+
+Input: columnTitle = "ZY"
+Output: 701
+ 
+
+Constraints:
+
+1 <= columnTitle.length <= 7
+columnTitle consists only of uppercase English letters.
+columnTitle is in the range ["A", "FXSHRXW"].