5 line easy c++
\n\n# Code\ncpp []\nclass Solution {\npublic:\n    long long minimumSteps(string s) {\n        long long k = 0,b = 0; \n        for (int i = 0; i < s.length(); 
\n\n# Code\n```cpp []\nclass Solution {\npublic:\n    long long minimumSteps(string s) {\n        long long k = 0,b = 0; \n        for (int i = 0; i < s.length(); i++)\n            if (s[i] == \'0\') k+=b; \n            else b++;\n        return k;\n    }\n};\n```
['String', 'Greedy', 'C++']