Conditional Expressions
expression0 ? expression1 : expression2
Meaning: The value of the conditional expression is expression1 if expression0 is true, and is expression2 otherwise.
/* Given A[0..N] sorted in non-decreasing order, return the subscript of an occurrence of val in A (if val occurs in A) or N+1 otherwise. */
int find(int[] A, int N, int val)
/* Make L==R s.t. if val is in A[0..N], then
return ____________________________________;