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:26:51: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[i][dict[j][strlen(dict[j])-1]] != 0) { ^ user.cpp:27:66: warning: array subscript has type ‘char’ [-Wchar-subscripts] int cost = i - last[i][dict[j][strlen(dict[j])-1]]; ^ user.cpp:28:59: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[i][dict[j][strlen(dict[j])-1]]; ^ user.cpp:30:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[previ-1][dict[j][k]] == 0) { ^ user.cpp:34:66: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost += max(0, previ - last[previ][dict[j][k]] - 1); ^ user.cpp:35:53: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[previ-1][dict[j][k]]; ^ user.cpp:20:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1; ^