Compilare: user.cpp: In function ‘int main()’: user.cpp:31:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] lst[str1[i]].push_back( i ); ^ user.cpp:36:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( lst[str2[i]].size() == 0 ) { ^ user.cpp:49:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans += i - lst[str2[i]].back() + p; ^ user.cpp:50:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] psm[lst[str2[i]].back()] ++; ^ user.cpp:51:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] lst[str2[i]].pop_back(); ^