Compilare: user.cpp: In function ‘bool isEuler()’: user.cpp:21:23: warning: statement has no effect [-Wunused-value] for ( it[ crt ] ; it[ crt ] < graf[ crt ].size() ; it[ crt ]++ ) { ^ user.cpp:21:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( it[ crt ] ; it[ crt ] < graf[ crt ].size() ; it[ crt ]++ ) { ^ user.cpp:27:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( it[ crt ] == graf[ crt ].size() ) { ^ user.cpp: In function ‘int main()’: user.cpp:55:27: warning: statement has no effect [-Wunused-value] for ( it[ crt ] ; it[ crt ] < graf[ crt ].size() ; it[ crt ]++ ) { ^ user.cpp:55:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( it[ crt ] ; it[ crt ] < graf[ crt ].size() ; it[ crt ]++ ) { ^ user.cpp:62:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( it[ crt ] == graf[ crt ].size() ) { ^