monochrome.cpp: In function 'int wyn(int)':
monochrome.cpp:10:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
10 | for(int i=0;i<b.size();i++)
| ~^~~~~~~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for(int i=0;i<s.length();i++)
| ~^~~~~~~~~~~
monochrome.cpp:45:19: warning: 'ostd' may be used uninitialized in this function [-Wmaybe-uninitialized]
45 | cout<<wyn(ostd);
| ^