Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] last[i][sir[i]]=i; ^ user.cpp:29:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[i][dict[j][strlen(dict[j])-1]] != 0) { ^ user.cpp:31:63: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost = i - last[i][dict[j][strlen(dict[j])-1]]; ^ user.cpp:32:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[i][dict[j][strlen(dict[j])-1]]-1; ^ user.cpp:34:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[previ][dict[j][k]] == 0) { ^ user.cpp:38:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost += previ - last[previ][dict[j][k]]; ^ user.cpp:39:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[previ][dict[j][k]]-1; ^ user.cpp:24:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1; ^