Compilare: main.cpp: In function 'bool solve(int)': main.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int j=len;j<v[i].size();j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void bs()': main.cpp:69:8: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] 69 | g<<ans; | ^~~