9815: ABC300 —— A - N-choice question
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Description
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.
This is a $N$-choice problem; the $i$-th choice is $C_i$.
Print the index of the correct choice.
Input
The input is given from Standard Input in the following format:
```
$N$ $A$ $B$
$C_1$ $C_2$ $\dots$ $C_N$
```
```
$N$ $A$ $B$
$C_1$ $C_2$ $\dots$ $C_N$
```
Output
Print the answer as an integer.
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.
- $1 \le N \le 300$
- $1 \le A,B \le 1000$
- $1 \le C_i \le 2000$
- $C_i$ 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.
Sample 1 Input
3 125 175
200 300 400
Sample 1 Output
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.
The first, second, and third choices are 200, 300, and 400, respectively.
Thus, the 2-nd choice is correct, so 2 should be printed.
Sample 2 Input
1 1 1
2
Sample 2 Output
1
The problem may be a one-choice problem.
Sample 3 Input
5 123 456
135 246 357 468 579
Sample 3 Output
5