Compilare: main.cpp: In function 'int main()': main.cpp:18:15: warning: array subscript has type 'char' [-Wchar-subscripts] f[s[i]]++; ^ main.cpp:33:24: warning: array subscript has type 'char' [-Wchar-subscripts] sol+=f[a[i]]; ^ main.cpp:35:15: warning: array subscript has type 'char' [-Wchar-subscripts] f[a[i]] = b[i]; ^ main.cpp:37:28: warning: array subscript has type 'char' [-Wchar-subscripts] L[i] = i - f[ s[i] ]; ^ main.cpp:40:28: warning: array subscript has type 'char' [-Wchar-subscripts] R[i] = i + f[ s[i] ]; ^