Compilare: user.cpp: In function ‘void BFS()’: user.cpp:1:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define REP(a,b) for(int a=0; a<(b); ++a) ^ user.cpp:63:9: note: in expansion of macro ‘REP’ REP(j,G[i].size()) ^ user.cpp: In function ‘void euler()’: user.cpp:73:10: warning: ‘v’ is used uninitialized in this function [-Wuninitialized] s[v++]=1; ^ user.cpp:5:34: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] #define BCK(a,b,c) for(int a=(b)-1; a>=(c); --a) ^ user.cpp:72:17: note: ‘r’ was declared here int p[NMAX],r; // stack ^