add: 220318-CN [cpp]

cpp/2203/220318-CN.cpp

@@ -0,0 +1,48 @@
+#include <vector>
+
+/**
+ * 2043. Simple Bank System
+ *
+ * You have been tasked with writing a program for a popular bank that will automate all its incoming transactions (transfer, deposit, and withdraw). The bank has n accounts numbered from 1 to n. The initial balance of each account is stored in a 0-indexed integer array balance, with the (i + 1)th account having an initial balance of balance[i].
+ *
+ * Execute all the valid transactions. A transaction is valid if:
+ *
+ * The given account number(s) are between 1 and n, and
+ * The amount of money withdrawn or transferred from is less than or equal to the balance of the account.
+ * Implement the Bank class:
+ *
+ * Bank(long[] balance) Initializes the object with the 0-indexed integer array balance.
+ * boolean transfer(int account1, int account2, long money) Transfers money dollars from the account numbered account1 to the account numbered account2. Return true if the transaction was successful, false otherwise.
+ * boolean deposit(int account, long money) Deposit money dollars into the account numbered account. Return true if the transaction was successful, false otherwise.
+ * boolean withdraw(int account, long money) Withdraw money dollars from the account numbered account. Return true if the transaction was successful, false otherwise.
+ */
+
+class Bank {
+private:
+	std::vector<long long> balance;
+public:
+	explicit Bank(std::vector<long long> b) : balance(std::move(b)) {}
+
+	bool transfer(int a1, int a2, long long m) {
+		if (a1 < 1 || a1 > balance.size() || a2 < 1 || a2 > balance.size() || balance[a1 - 1] < m)
+			return false;
+		balance[a1 - 1] -= m;
+		balance[a2 - 1] += m;
+		return true;
+	}
+
+	bool deposit(int a, long long m) {
+		if (a >= 1 && a <= balance.size())
+			balance[a - 1] += m;
+		else
+			return false;
+		return true;
+	}
+
+	bool withdraw(int a, long long m) {
+		if (a < 1 || a > balance.size() || balance[a - 1] < m)
+			return false;
+		balance[a - 1] -= m;
+		return true;
+	}
+};

cpp/2203/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2203)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2203 220318.cpp)
+ADD_EXECUTABLE(2203 220318-CN.cpp)