Compilare: user.cpp: In function ‘int binSearch1(int)’: user.cpp:30:30: warning: unused variable ‘sol’ [-Wunused-variable] int left=1,right=top,mid,sol=0; ^ user.cpp:41:9: warning: variable ‘a’ set but not used [-Wunused-but-set-variable] int a; ^ user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:72:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘int binSearch1(int)’: user.cpp:43:1: warning: control reaches end of non-void function [-Wreturn-type] } ^