20240926 finished.

src/problem/mod.rs

@@ -245,4 +245,5 @@ mod p2376_count_special_integers;
 mod p2374_node_with_highest_edge_score;
 mod p997_find_the_town_judge;
 mod p2207_maximize_number_of_subsequences_in_a_string;
-mod p2306_naming_a_company;
+mod p2306_naming_a_company;
+mod p2535_difference_between_element_sum_and_digit_sum_of_an_array;

src/problem/p2535_difference_between_element_sum_and_digit_sum_of_an_array.rs

@@ -0,0 +1,42 @@
+/**
+ * [2535] Difference Between Element Sum and Digit Sum of an Array
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn difference_of_sum(nums: Vec<i32>) -> i32 {
+        let mut result = 0;
+
+        for num in nums {
+            let mut num = num;
+            let mut base = 1;
+
+            while num > 0 {
+                let digit = num % 10;
+
+                result += digit * base - digit;
+
+                base *= 10;
+                num = num / 10;
+            }
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2535() {
+        assert_eq!(9, Solution::difference_of_sum(vec![1, 15, 6, 3]));
+        assert_eq!(0, Solution::difference_of_sum(vec![1, 2, 3, 4]));
+    }
+}