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A - N-choice question

Score : $100$ points

Problem Statement

Given integers $A$ and $B$, find $A+B$.
This is a $N$-choice problem; the $i$-th choice is $C_i$.
Print the index of the correct choice.

Constraints

• All values in the input are integers.
• $1 \le N \le 300$
• $1 \le A,B \le 1000$
• $1 \le C_i \le 2000$
• $C_i$ are pairwise distinct. In other words, no two choices have the same value.
• There is exactly one $i$ such that $A+B=C_i$. In other words, there is always a unique correct choice.

Input

The input is given from Standard Input in the following format:

$N$ $A$ $B$

$C_1$ $C_2$ $\dots$ $C_N$

Output

Print the answer as an integer.

3 125 175
200 300 400

2

We have $125+175 = 300$.
The first, second, and third choices are $200$, $300$, and $400$, respectively.
Thus, the $2$-nd choice is correct, so $2$ should be printed.

1 1 1
2

1

The problem may be a one-choice problem.

5 123 456
135 246 357 468 579

5