Compilare: main.cpp: In function 'int main()': main.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int i=0; i<b.size(); i++) | ~^~~~~~~~~ main.cpp:46:15: warning: array subscript has type 'char' [-Wchar-subscripts] 46 | v[b[i]].push_back(i+1); | ^ main.cpp:48:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for(int i=0; i<a.size(); i++) | ~^~~~~~~~~ main.cpp:50:29: warning: array subscript has type 'char' [-Wchar-subscripts] 50 | fin.push_back(v[a[i]][mp[a[i]]]); | ^ main.cpp:55:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for(int i=0; i<fin.size(); i++) | ~^~~~~~~~~~~