Compilare: user.cpp: In function ‘int main()’: user.cpp:9:41: warning: unused variable ‘a’ [-Wunused-variable] int n,x,sc=-1,smax=-99999999,pc,k,i,a,b,sum[500001],pmax; ^ user.cpp:9:57: warning: variable ‘pmax’ set but not used [-Wunused-but-set-variable] int n,x,sc=-1,smax=-99999999,pc,k,i,a,b,sum[500001],pmax; ^ user.cpp:30:19: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<pc<<" "<<b<<" "<<smax; ^ user.cpp:30:10: warning: ‘pc’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<pc<<" "<<b<<" "<<smax; ^