Compilare: user.cpp: In function ‘void dfsC(int)’: user.cpp:56:33: warning: variable ‘fiu2’ set but not used [-Wunused-but-set-variable] int mx1=-1, mx2=-1, fiu1=0, fiu2=0; ^ user.cpp: In function ‘void dfsD(int)’: user.cpp:92:68: warning: variable ‘fiu3’ set but not used [-Wunused-but-set-variable] int mx1=0, mx2=0, mx3=0, mx1arb=-1, mx2arb=-1, fiu1=0, fiu2=0, fiu3=0, arb1=0, arb2=0; ^ user.cpp:92:84: warning: variable ‘arb2’ set but not used [-Wunused-but-set-variable] int mx1=0, mx2=0, mx3=0, mx1arb=-1, mx2arb=-1, fiu1=0, fiu2=0, fiu3=0, arb1=0, arb2=0; ^ user.cpp: In function ‘void write()’: user.cpp:174:9: warning: unused variable ‘a’ [-Wunused-variable] int a, b; ^ user.cpp:174:12: warning: unused variable ‘b’ [-Wunused-variable] int a, b; ^