Easiest c++ solution with 0 ms runtime
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:0ms run time\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\nclass Solution {\npublic:\n    int subtractProductAndSum(int n) {\n        int num=n,pro=1,sum=0;\n        while(num){\n            pro*=num%10;\n            num=num/10;\n             }\n             while(n){\n                sum+=n%10;\n                n=n/10;\n             }\n             return pro-sum;\n        \n    }\n};\n```
['C++']