akshar702

/**
 * Approach: 2D Rectangle Coverage using Coordinate Compression
 *
 * 1. Collect all unique distance boundary points from target + cameras
 * 2. For each distance slice between consecutive boundaries:
 *    - Find cameras covering that entire slice
 *    - Check if those cameras fully cover the light range (1D problem)
 * 3. If any slice fails light coverage → insufficient
 *
 * IMPROVED: Added input validation and invalid camera filtering

akshar702

/**
 * Approach: 2D Rectangle Coverage using Coordinate Compression
 * 
 * 1. Collect all unique distance boundary points from target + cameras
 * 2. For each distance slice between consecutive boundaries:
 *    - Find cameras covering that entire slice
 *    - Check if those cameras fully cover the light range (1D problem)
 * 3. If any slice fails light coverage → insufficient
 */