define PR(x) cout<<#x<<"="<<x<<endl

define READ2(x,y) scanf("%d %d",&x,&y)

define REP(i,a,b) for(int i=a;i<b;i++)

define RP(i,a) for(int i=0;i<a;i++)

define tr(iter,container) for(auto iter = container.begin();iter!=container.end();iter++)

define S(x) cin>>x

define PRARR(x,n) for(int i=0;i<n;i++) cout<<#x<<"["<<i<<"]= "<<x[i]

define rd(arr,i,n) for(int i=0;i<n;i++) cin>>arr[i]

define PB push_back

define SUM(arr,n,sum) {sum=0;for(int i=0;i<n;i++) sum+=arr[i]; }

define VC vector

define CLR(arr) memset(arr,0,sizeof(arr))

define FILL(arr,val) memset(arr,val,sizeof(arr))

Why..C-style C++ !?

Ref: http://debian.fmi.uni-sofia.bg/~mrpaff/Effective%20C++/EC/EI1_FR.HTM