Compilare: main.cpp: In function 'int main()': main.cpp:37:39: warning: array subscript has type 'char' [-Wchar-subscripts] 37 | hshA1 = hshA1 * P + r[a[i]]; | ^ main.cpp:38:46: warning: array subscript has type 'char' [-Wchar-subscripts] 38 | hshA2 = (hshA2 * P % mod + r[a[i]]) % mod; | ^ main.cpp:42:47: warning: array subscript has type 'char' [-Wchar-subscripts] 42 | hshB1[i] = hshB1[i-1] * P + r[b[i]]; | ^ main.cpp:43:54: warning: array subscript has type 'char' [-Wchar-subscripts] 43 | hshB2[i] = (hshB2[i-1] * P % mod + r[b[i]]) % mod; | ^