Compilare: main.cpp: In function 'int main()': main.cpp:60:31: warning: array subscript has type 'char' [-Wchar-subscripts] h = (h * 62 + cod[a[n]]) % P; ^ main.cpp:68:33: warning: array subscript has type 'char' [-Wchar-subscripts] h1 = (h1 * 62 + cod[b[i]]) % P; ^ main.cpp:77:31: warning: array subscript has type 'char' [-Wchar-subscripts] h1 = ((h1 - cod[b[i-n]] * pw % P + P) * 62 + cod[b[i]]) % P; ^ main.cpp:77:62: warning: array subscript has type 'char' [-Wchar-subscripts] h1 = ((h1 - cod[b[i-n]] * pw % P + P) * 62 + cod[b[i]]) % P; ^