Best approach ||CPP|| solution 0ms runtime
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\nThe given code defines a class named Solution with a member function mini
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\nThe given code defines a class named `Solution` with a member function `minimumSum`. This function takes an integer `num` as input and calculates the minimum sum of two numbers by rearranging the digits of `num`.\n\nHere\'s a step-by-step explanation of the code:\n\n1. Create an empty vector `v` to store the individual digits of the input number `num`.\n\n2. Enter a while loop that continues until `num` becomes zero. Inside the loop:\n   - Get the last digit of `num` by taking the modulus (`num % 10`), which gives the remainder when `num` is divided by 10.\n   - Append the last digit to the vector `v`.\n   - Update `num` by dividing it by 10 (`num = num / 10`) to remove the last digit.\n\n3. Sort the vector `v` in ascending order using `sort(v.begin(), v.end())`. This will rearrange the digits in `v` from smallest to largest.\n\n4. Create two numbers, `num1` and `num2`, by combining specific digits from the sorted vector `v`:\n   - `num1` is formed by taking the smallest digit (`v[0]`) and the third smallest digit (`v[2]`).\n   - `num2` is formed by taking the second smallest digit (`v[1]`) and the fourth smallest digit (`v[3]`).\n\n5. Return the sum of `num1` and `num2` as the minimum sum of two numbers.\n\nIt\'s important to note that this code assumes the input `num` has at least four digits. If `num` has fewer than four digits, the code may produce unexpected results or encounter runtime errors.\n\n\n# Code\n```\nclass Solution {\npublic:\n    int minimumSum(int num) {\n        vector <int> v;\n        while(num){\n            v.push_back(num%10);\n            num=num/10;\n        }\n        sort(v.begin(),v.end());\n        int num1=v[0]*10+v[2],num2=v[1]*10+v[3];\n        return num1+num2;        \n\n    }\n};\n```
['Math', 'Greedy', 'Sorting', 'C++']