let L = Int(readLine()!)!
let N = Int(readLine()!)!
var W = readLine()!.split(separator: " ").map{Int($0)!}
W.sort()

var sum :Int = 0
var count :Int = 0

while sum < L{
    sum = sum + W[count]
    count = count + 1
}
print(count - 1)