import Foundation

func readInput(_ filePath: String) throws -> [Int] {
    return try String(contentsOfFile: filePath, encoding: .ascii)
        .split(separator: "\n").compactMap { Int($0) }
}

func rand(seed: Int, n: Int) -> Int {
    return (0..<n).reduce(seed) { prev, _ in
        var res = ((prev << 6) ^ prev) & 0b111111111111111111111111
        res = ((res >> 5) ^ res)
        return ((res << 11) ^ res) & 0b111111111111111111111111
    }
}

let seeds = try readInput(CommandLine.arguments[1])
print(seeds.map { rand(seed: $0, n: 2000) }.reduce(0, +))