Parcel Delivery Optimization

You are running a delivery service that needs to optimize the number of parcels delivered based on their sizes and the capacity each vehicle can carry. Your goal is to maximize the number of parcels delivered without exceeding vehicle capacity. Input: The first line contains two integers: `C` (capacity of each vehicle) and `N` (number of parcels). The next `N` lines each contain an integer: `S_i` (size of the parcel). Output: Print a single integer: the total number of parcels successfully delivered. Example: Input: 10 5 2 3 4 5 1 Output: 4