Compilare: user.cpp: In function ‘int main()’: user.cpp:20:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] last[i][sir[i]]=i; ^ user.cpp:31:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[i][dict[j][len-1]] != 0 && len <= i) { ^ user.cpp:33:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost = i - last[i][dict[j][len-1]]; ^ user.cpp:34:47: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[i][dict[j][len-1]]; ^ user.cpp:36:49: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (last[previ-1][dict[j][k]] == 0) { ^ user.cpp:41:61: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost += previ - last[previ-1][dict[j][k]]-1; ^ user.cpp:42:53: warning: array subscript has type ‘char’ [-Wchar-subscripts] previ = last[previ-1][dict[j][k]]; ^