Weighted Coin Change

You are given a list of coins, each with a certain value and weight. You need to determine the maximum value you can obtain with a fixed weight limit when combining these coins. The same coin can be used multiple times. Output the maximum value possible. Input format: - The first line contains two integers, n (the number of coins) and W (the maximum weight). - The next n lines each contain two integers, value and weight (the value and weight of each coin). Output format: - A single integer representing the maximum value obtainable. Example: Input: 3 50 60 10 100 20 120 30 Output: 300