Water Distribution

You are given a grid representing a system of pipelines to distribute water. A cell with a 0 represents a blocked section, while a cell with a positive integer represents the amount of water that can flow through it. Determine the maximum amount of water that can be collected when flowing from the top-left corner to the bottom-right corner of the grid. You can only move down or right. If it is impossible to reach the target, return 0. Input format: R C 0/P1 P2 P3 ... Where R is the number of rows (1 <= R <= 100) and C is the number of columns (1 <= C <= 100), and each following line contains C integers indicating the pipeline flow. Output format: Print the maximum water that can be collected or 0. Example: Input: 3 3 1 2 0 0 2 1 1 0 3 Output: 4