#include using namespace std; int main() { int a,b,c,sum,n,count; a=b=c=0; sum=0; do { cin>>n; count++; switch(n) { case 1: a++; break; case 2: b++; break; case 3: c++; break; }while(n!=-1); sum=a+b+c; count/=2; cout<<"A="<<a<<endl; cout<<"B="<<b<<endl; cout...