/in/foo.cc: In function 'int main()':
/in/foo.cc:5:6: warning: unused variable 'j' [-Wunused-variable]
  int j,A,B,m,n,a,b,x,y,s,t,i=0,k=0;
      ^
/in/foo.cc:5:28: warning: unused variable 'i' [-Wunused-variable]
  int j,A,B,m,n,a,b,x,y,s,t,i=0,k=0;
                            ^