Problem Statement

Water Flow Simulation body { font-family: Arial, sans-serif; line-height: 1.6; margin: 20px; } .problem-container { max-width: 800px; margin: 0 auto; padding: 20px; border: 1px solid #ccc; border-radius: 8px; background-color: #f9f9f9; } h1, h2, h3 { color: #333; } .problem-description, .input-format, .output-format, .constraints, .examples { margin-bottom: 20px; } .example { background-color: #fff; padding: 15px; border: 1px solid #ddd; border-radius: 5px; margin-bottom: 15px; } pre { background-color: #f4f4f4; padding: 10px; border: 1px solid #ddd; border-radius: 5px; overflow-x: auto; } .explanation { margin-top: 10px; color: #555; } table { width: 100%; border-collapse: collapse; margin-bottom: 20px; } table, th, td { border: 1px solid #ddd; } th, td { padding: 8px; text-align: left; } th { background-color: #f2f2f2; } Water Flow Simulation Civil engineers are simulating rainfall on a digital elevation model to study water flow. You are given a 2D array of integers heights represen