Compilare: user.cpp: In function ‘bool ok(int)’: user.cpp:28:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ori.size();i++) ^ user.cpp:31:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<verti.size();j++) ^ user.cpp:39:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ori.size();i++) ^ user.cpp:41:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<ori.size();j++) ^ user.cpp:27:13: warning: unused variable ‘xx’ [-Wunused-variable] int i,j,xx,yy; ^ user.cpp:27:16: warning: unused variable ‘yy’ [-Wunused-variable] int i,j,xx,yy; ^ user.cpp: In function ‘int main()’: user.cpp:69:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,t,a,b,c,d; ^ user.cpp:69:13: warning: unused variable ‘t’ [-Wunused-variable] int i,j,t,a,b,c,d; ^