20250327 finished.

src/problem/mod.rs

@@ -562,3 +562,5 @@ mod p2255_count_prefixes_of_a_given_string;
 mod p2711_difference_of_number_of_distinct_values_on_diagonals;
 
 mod p2829_determine_the_minimum_sum_of_a_k_avoiding_array;
+
+mod p2712_minimum_cost_to_make_all_characters_equal;

src/problem/p2712_minimum_cost_to_make_all_characters_equal.rs

@@ -0,0 +1,34 @@
+/**
+ * [2712] Minimum Cost to Make All Characters Equal
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn minimum_cost(s: String) -> i64 {
+        let mut result = 0;
+        let s: Vec<u8> = s.bytes().collect();
+
+        for i in 1..s.len() {
+            if s[i] != s[i - 1] {
+                result += i.min(s.len() - i) as i64;
+            }
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2712() {
+        assert_eq!(2, Solution::minimum_cost("0011".to_owned()));
+        assert_eq!(9, Solution::minimum_cost("010101".to_owned()));
+    }
+}