let boxWidth:[Int] = readLine()!.split(separator: " ").map{Int($0)!}
let blockSize:[Int] = readLine()!.split(separator: " ").map{Int($0)!}
var blockWidth:[Int] = readLine()!.split(separator: " ").map{Int($0)!}

blockWidth.sort(){$0 < $1}

var sum:Int = 0
var count:Int = 0
for i in 0..<blockSize[0] {
    sum += blockWidth[i]
    if(sum > boxWidth[0]) {
        break
    }
    count += 1
}

print(count)