feat: add solutions to lc problem: No.0504

No.0504.Base 7

Author: YangFong

solution/0500-0599/0504.Base 7/README.md

@@ -46,6 +46,52 @@
 
 ```
 
+### **TypeScript**
+
+```ts
+function convertToBase7(num: number): string {
+    if (num == 0) {
+        return '0';
+    }
+    let res = '';
+    const isMinus = num < 0;
+    if (isMinus) {
+        num = -num;
+    }
+    while (num != 0) {
+        const r = num % 7;
+        res = r + res;
+        num = (num - r) / 7;
+    }
+    return isMinus ? '-' + res : res;
+}
+```
+
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn convert_to_base7(mut num: i32) -> String {
+        if num == 0 {
+            return String::from("0");
+        }
+        let mut res = String::new();
+        let is_minus = num < 0;
+        if is_minus {
+            num = -num;
+        }
+        while num != 0 {
+            res.push_str((num % 7).to_string().as_str());
+            num /= 7;
+        }
+        if is_minus {
+            res.push('-');
+        }
+        res.chars().rev().collect()
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0500-0599/0504.Base 7/README_EN.md

@@ -52,6 +52,52 @@ The input will be in range of [-1e7, 1e7].
 
 ```
 
+### **TypeScript**
+
+```ts
+function convertToBase7(num: number): string {
+    if (num == 0) {
+        return '0';
+    }
+    let res = '';
+    const isMinus = num < 0;
+    if (isMinus) {
+        num = -num;
+    }
+    while (num != 0) {
+        const r = num % 7;
+        res = r + res;
+        num = (num - r) / 7;
+    }
+    return isMinus ? '-' + res : res;
+}
+```
+
+### **Rust**
+
+```rust
+impl Solution {
+    pub fn convert_to_base7(mut num: i32) -> String {
+        if num == 0 {
+            return String::from("0");
+        }
+        let mut res = String::new();
+        let is_minus = num < 0;
+        if is_minus {
+            num = -num;
+        }
+        while num != 0 {
+            res.push_str((num % 7).to_string().as_str());
+            num /= 7;
+        }
+        if is_minus {
+            res.push('-');
+        }
+        res.chars().rev().collect()
+    }
+}
+```
+
 ### **...**
 
 ```

solution/0500-0599/0504.Base 7/Solution.rs

@@ -0,0 +1,20 @@
+impl Solution {
+    pub fn convert_to_base7(mut num: i32) -> String {
+        if num == 0 {
+            return String::from("0");
+        }
+        let mut res = String::new();
+        let is_minus = num < 0;
+        if is_minus {
+            num = -num;
+        }
+        while num != 0 {
+            res.push_str((num % 7).to_string().as_str());
+            num /= 7;
+        }
+        if is_minus {
+            res.push('-');
+        }
+        res.chars().rev().collect()
+    }
+}

solution/0500-0599/0504.Base 7/Solution.ts

@@ -0,0 +1,16 @@
+function convertToBase7(num: number): string {
+    if (num == 0) {
+        return '0';
+    }
+    let res = '';
+    const isMinus = num < 0;
+    if (isMinus) {
+        num = -num;
+    }
+    while (num != 0) {
+        const r = num % 7;
+        res = r + res;
+        num = (num - r) / 7;
+    }
+    return isMinus ? '-' + res : res;
+}