Compilare: user.cpp: In function ‘int main()’: user.cpp:15:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<s.size();i++) ^ user.cpp:17:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[s[i]]=i; ^ user.cpp:26:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<x.size();j++) ^ user.cpp:28:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=val[x[j]]*putere; ^ user.cpp:35:19: warning: iteration 3000u invokes undefined behavior [-Waggressive-loop-optimizations] if(f[i]!=0) k++; ^ user.cpp:33:9: note: containing loop for(i=0;i<=2999999;i++) ^