Compilare: main.cpp: In function 'int main()': main.cpp:62:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<SolEdges.size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:37:17: warning: unused variable 'a' [-Wunused-variable] int i,c,x,y,a,b; ^ main.cpp:37:19: warning: unused variable 'b' [-Wunused-variable] int i,c,x,y,a,b; ^ main.cpp: In function 'int Find(int)': main.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type] } ^