Compilare: user.cpp: In function ‘void Solve()’: user.cpp:31:27: warning: unused variable ‘counter’ [-Wunused-variable] int Begin1=1,Begin2=1,counter=0; ^ user.cpp: In function ‘int main()’: user.cpp:108:47: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%lld %lld\n",Length[i],Code[i]); ^ user.cpp:98:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("huffman.out","w",stdout); ^