Solutions

AllFactors.cpp

@@ -0,0 +1,20 @@
+#include<bits/stdc++.h>
+
+vector<int> Solution::allFactors(int num){
+
+    vector<int> ans;
+    for(int i = 1; i <= (int)(sqrt(num)); i++){
+         if(num%i == 0){
+            if(num/i == i){
+                ans.push_back(i);
+            }
+            else{
+                ans.push_back(i);
+                ans.push_back(num / i);
+            }
+        }    
+    }
+    sort(ans.begin(), ans.end());
+    return ans;
+
+}

BinaryRepresentation.cpp

@@ -0,0 +1,19 @@
+#include<bits/stdc++.h>
+
+string Solution::findDigitsInBinary(int num){
+
+    string ans = "";
+    if(num == 0)
+        return "0";
+    while(num != 1){
+        if(num%2 == 0)
+            ans += "0";
+        else 
+            ans += "1";
+        num /= 2;
+    }
+    ans += "1";
+    reverse(ans.begin(), ans.end());
+    return ans;
+
+}

ExcelColumnNumber.cpp

@@ -0,0 +1,14 @@
+#include<bits/stdc++.h>
+
+int Solution::titleToNumber(string s){
+
+    int n = s.size();
+    int ans = 0;
+    int cnt = 0;
+    for(int i = n - 1; i >= 0; i--){
+        ans += (pow(26, cnt) * (s[i] - 'A' + 1));
+        cnt++;
+    }
+    return ans;
+
+}

ExcelColumnTitle.cpp

@@ -0,0 +1,26 @@
+#include<bits/stdc++.h>
+
+string Solution::convertToTitle(int num){
+
+    unordered_map<int, char> mp = {{1, 'A'}, {2, 'B'}, {3, 'C'}, {4, 'D'}, {5, 'E'}, 
+    {6, 'F'}, {7, 'G'}, {8, 'H'}, {9, 'I'}, {10, 'J'}, 
+    {11, 'K'}, {12, 'L'}, {13, 'M'}, {14, 'N'}, {15, 'O'}, 
+    {16, 'P'}, {17, 'Q'}, {18, 'R'}, {19, 'S'}, {20, 'T'}, 
+    {21, 'U'}, {22, 'V'}, {23, 'W'}, {24, 'X'}, {25, 'Y'}, {26, 'Z'}};
+    string ans = "";
+    while(num != 0){
+        int rem = num % 26;
+        if(rem == 0){
+            rem = 26;
+            num /= 26;
+            num -= 1;
+        }
+        else{
+            num /= 26;
+        }
+        ans += mp[rem];
+    }
+    reverse(ans.begin(), ans.end());
+    return ans;
+
+}