Compilare: main.cpp: In function 'int trans(std::string)': main.cpp:87:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (int i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'std::string add(std::string, std::string)': main.cpp:110:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 110 | for (int i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp:114:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 114 | if (i <= b.size() - 1) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::string prod(std::string, std::string)': main.cpp:157:9: warning: unused variable 'bs' [-Wunused-variable] 157 | int bs = b.size(); | ^~ main.cpp: In function 'void solve()': main.cpp:207:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 207 | if (negB == 1) | ^~ main.cpp:209:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 209 | if(INT(ans)) | ^~