SystemVerilog Testbench Introduction

SystemVerilog Testbench Architecture

APB Interface

APB Transaction

APB Generator

APB Driver

APB Driver Phase 2

APB Monitor

APB Scoreboard

APB Environment

APB Testbench Top

RISC-V Processor (YARP) Interface

YARP Transaction

YARP Generator

YARP Driver

YARP Data Memory Model

YARP Monitor

YARP Scoreboard

YARP Testbench Top

DVCon 26 Hackathon Problem

Array Sum Limit

Array Index Sum Limit

Ball Draw No Repeat

Conditional Even Probability

Even Odd Index Value

Five Consecutive Ones

Frequency Constraint

Grouped Ones

Index Value Range

Leap Year

Matrix Rotation

Non Adjacent Ones

Power of 4

Dynamic Ranges

Recent Four Unique

Row Max Unique

Subarray Max Sum

Three Duplicates Only

Tic Tac Toe

Unique 3D Array

Weighted Popcount

Unique Sum

Split Array into Queues

# Ball Draw Without Repeat in Last 3 Positions

## Problem Statement

You are drawing from 10 colored balls (labeled 0-9) in a sequence of 10 draws. The constraint is that no color can be drawn in the last 3 consecutive positions.
- Current draw cannot equal previous three draws

Generate a valid sequence of 10 draws that satisfies these constraints.

## Constraints
- Sequence length: 10
- Colors available: 0-9 (integers)

## Examples

### Example 1:
```
Generate a valid sequence
Output: [0, 1, 2, 3, 4, 5, 2, 1, 3, 0]
Explanation:
- Each position i differs from i-1, i-2, and i-3
- Color 2 appears at indices 2 and 6 (difference of 4, which is > 3)
- Color 0 appears at indices 0 and 9 (difference of 9, which is > 3)
```

### Example 2:
```
[0, 1, 0, 1, 0, 1, 0, 1, 0, 1]
Invalid
Explanation: Position 2 (value 0) violates the constraint because:
- Position 1 (value 1) differs: OK
- Position 0 (value 0) is the same: VIOLATION
```

### Example 3:
```
[1, 2, 3, 4, 1, 2, 3, 4, 1, 2]
Valid
Explanation: Each element differs from the three preceding elements.
```


Ball Draw