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| class Bank {
var bank:[Int]
let length:Int
init(_ balance: [Int]) {
bank = balance
length = balance.count
}
func transfer(_ account1: Int, _ account2: Int, _ money: Int) -> Bool {
if account1 <= length && account2 <= length && bank[account1-1] >= money {
bank[account1-1] -= money
bank[account2-1] += money
return true
}
return false
}
func deposit(_ account: Int, _ money: Int) -> Bool {
if account <= length {
bank[account-1] += money
return true
}
return false
}
func withdraw(_ account: Int, _ money: Int) -> Bool {
if account <= length && bank[account-1] >= money {
bank[account-1] -= money
return true
}
return false
}
}
|