import Foundation

let _ = readLine()!
var input = readLine()!.componentsSeparatedByString(" ").map { Int($0)! }

var sum = 0
for i in input {
    sum += i
}

let maxL = input.maxElement()!

if maxL < sum - maxL {
    print("Yes\n")
} else {
    print("No\n")
}
