create 0179-largest-number.cpp

Author: Maunish-dave

cpp/0179-largest-number.cpp

@@ -0,0 +1,29 @@
+class Solution {
+public:
+
+    // to check which should come first
+    // see that by adding in which way gives bigger number
+    static bool mysort(string a, string b){
+        return a+b > b+a;
+    }
+    string largestNumber(vector<int>& nums) {
+        string s = "";
+        vector<string> all_numbers;
+        
+        // convert every number to string
+        for(int it: nums){
+            all_numbers.push_back(to_string(it));
+        }
+
+        // sort accoring to custom sort function
+        sort(all_numbers.begin(),all_numbers.end(),mysort);
+        if(all_numbers[0]=="0"){
+            return "0";
+        }
+        
+        for(string a: all_numbers){
+            s += a;
+        }
+        return s;
+    }
+};