Compilare: user.cpp: In function ‘void euler(int, int)’: user.cpp:21:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<graf[node].size(); i++) ^ user.cpp: In function ‘void process()’: user.cpp:32:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i<=v.size(); i++) ^ user.cpp:34:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=v.size(); i++) ^ user.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;(1<<i)<v.size();i++) ^ user.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<=v.size()-(1<<i); j++) ^