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Java Solution for LeetCode algorithm problems, continually updating
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package g2001_2100.s2043_simple_bank_system;
// #Medium #Array #Hash_Table #Design #Simulation
// #2022_05_27_Time_128_ms_(72.30%)_Space_81_MB_(76.62%)
public class Bank {
private final long[] accounts;
public Bank(long[] balance) {
accounts = balance;
}
private boolean validate(int account, long money, boolean withdraw) {
return account < accounts.length && (!withdraw || accounts[account] >= money);
}
public boolean transfer(int account1, int account2, long money) {
if (validate(account1 - 1, money, true) && validate(account2 - 1, 0, false)) {
accounts[account1 - 1] -= money;
accounts[account2 - 1] += money;
return true;
}
return false;
}
public boolean deposit(int account, long money) {
if (validate(account - 1, money, false)) {
accounts[account - 1] += money;
return true;
}
return false;
}
public boolean withdraw(int account, long money) {
if (validate(account - 1, money, true)) {
accounts[account - 1] -= money;
return true;
}
return false;
}
}
/*
* Your Bank object will be instantiated and called as such:
* Bank obj = new Bank(balance);
* boolean param_1 = obj.transfer(account1,account2,money);
* boolean param_2 = obj.deposit(account,money);
* boolean param_3 = obj.withdraw(account,money);
*/