Compilare: main.cpp: In function 'void v2()': main.cpp:33:34: warning: operation on 'n' may be undefined [-Wsequence-point] while((n<k)&&(a[n]+a[n-1]<ma))a[++n]=a[n-1]+a[n-2]; ^~~ main.cpp:33:34: warning: operation on 'n' may be undefined [-Wsequence-point] main.cpp:29:16: warning: unused variable 'y' [-Wunused-variable] {long long i,x,y,z; ^ main.cpp:29:18: warning: unused variable 'z' [-Wunused-variable] {long long i,x,y,z; ^