Compilare: user.cpp: In function ‘int main()’: user.cpp:18:11: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fin>>s+1>>k; ^ user.cpp:47:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost=co[s[first]][d]+co[s[last]][d]; ^ user.cpp:47:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] cost=co[s[first]][d]+co[s[last]][d]; ^