Compilare: user.cpp: In function ‘int main()’: user.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < strlen(s);i++) ^ user.cpp:19:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[i]]++; ^ user.cpp:20:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] adev[v[s[i]] - 1] = false; ^ user.cpp:21:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] adev[v[s[i]]] = true; ^ user.cpp:22:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[s[i]] < minn.val || minn.lit == s[i])minn.val = v[s[i]], minn.lit = s[i]; ^ user.cpp:22:68: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[s[i]] < minn.val || minn.lit == s[i])minn.val = v[s[i]], minn.lit = s[i]; ^ user.cpp:23:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[s[i]] > maxx)maxx = v[s[i]]; ^ user.cpp:23:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[s[i]] > maxx)maxx = v[s[i]]; ^