Compilare: user.cpp: In function ‘void df(int)’: user.cpp:38:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++) ^ user.cpp:48:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++) ^ user.cpp:33:6: warning: unused variable ‘ok’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp:33:11: warning: unused variable ‘fiu’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp:33:15: warning: unused variable ‘f’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp:33:17: warning: unused variable ‘fiu2’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp:33:22: warning: unused variable ‘q’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp:33:24: warning: unused variable ‘p’ [-Wunused-variable] int ok=0,fiu,f,fiu2,q,p; ^ user.cpp: In function ‘bool check(ar, int)’: user.cpp:93:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<b[nod].size();i++){ ^ user.cpp: In function ‘void make(int, int, ar, int, int, int*, int*)’: user.cpp:107:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int s=0;s<b[fii[x]].size();s++) ^