SimpleCardGame | Topcoder Archive

Problem Statement

A round of Blackjack has ended and it's time to reveal the winner. Use the following two rules to determine the outcome of the round:

If a player has more than 21 points, he loses.
Of all the players who have 21 or fewer points, the ones with the maximum number of points are the winners.

You are given a int[] points, where points[i] is the number of points received by the i-th player. If there is exactly one winner, return the 0-based index of the winning player. Otherwise, return -1.

Definition

Class:: SimpleCardGame
Method:: whoIsTheWinner
Parameters:: int[]
Returns:: int
Method signature:: int whoIsTheWinner(int[] points)
(be sure your method is public)

Constraints

points will contain between 1 and 50 elements, inclusive.
Each element of points will be between 1 and 35, inclusive.

Examples

```
{1, 2}
```
```
Returns: 1
```
Both players have 21 or fewer points. Among them, player 1 has the maximum number of points.
```
{1, 2, 3, 3, 2}
```
```
Returns: -1
```
Players 2 and 3 both have the maximum number of points, so we have 2 winners.
```
{1, 22}
```
```
Returns: 0
```
Player 1 has more than 21 points, so the winner is player 0.
```
{21, 20, 19}
```
```
Returns: 0
```
```
{22, 23, 22}
```
```
Returns: -1
```
No winner here.
```
{1, 2, 21, 3, 4, 21}
```
```
Returns: -1
```

{31, 33, 4, 23, 3, 23, 12, 35, 17, 27, 14, 6}

Returns: 8

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