C++ easy solution.
\n\n# Code\n\nclass Solution {\npublic:\n    int minimumSum(int num) {\n        vector<int>v;\n        while(num!=0){\n            v.push_back(num%10);\n       
\n\n# Code\n```\nclass Solution {\npublic:\n    int minimumSum(int num) {\n        vector<int>v;\n        while(num!=0){\n            v.push_back(num%10);\n            num/=10;\n        }\n        sort(v.begin(),v.end());\n        return (v[0]*10+v[1]*10+v[2]+v[3]);\n    }\n};\n```
['Math', 'C++']