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class Bank {
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 public:
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  vector<long long> temp;
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  int n;
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  Bank(vector<long long> &balance) {
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    temp = balance;
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    n = balance.size();
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  }
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  bool transfer(int account1, int account2, long long money) {
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    if (account1 <= n && account2 <= n && account1 > 0 && account2 > 0 &&
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        temp[account1 - 1] >= money) {
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      temp[account1 - 1] -= money;
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      temp[account2 - 1] += money;
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      return true;
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    }
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    return false;
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  }
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  bool deposit(int account, long long money) {
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    if (account > n || account < 0) return false;
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    temp[account - 1] += money;
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    return true;
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  }
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  bool withdraw(int account, long long money) {
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    if (account <= n && account > 0 && temp[account - 1] >= money) {
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      temp[account - 1] -= money;
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      return true;
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    }
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    return false;
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  }
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};