View Compilation Error

0_0_33321263_20967.c: In function 'main':
0_0_33321263_20967.c:6:54: error: lvalue required as left operand of assignment
  (n&1)?('\n'==getchar())?(printf("%d\n",r*n)&(r=1)):r*=n:n=0;
                                                      ^