20241102 finished.

src/problem/mod.rs

@@ -290,3 +290,5 @@ mod p3216_lexicographically_smallest_string_after_a_swap;
 mod p3165_maximum_sum_of_subsequence_with_non_adjacent_elements;
 
 mod p3259_maximum_energy_boost_from_two_drinks;
+
+mod p3226_number_of_bit_changes_to_make_two_integers_equal;

src/problem/p3226_number_of_bit_changes_to_make_two_integers_equal.rs

@@ -0,0 +1,54 @@
+/**
+ * [3226] Number of Bit Changes to Make Two Integers Equal
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn min_changes(n: i32, k: i32) -> i32 {
+        if n == k {
+            return 0;
+        }
+
+        let (mut n, mut k) = (n, k);
+        let mut result = 0;
+
+        while n != 0 {
+            if n % 2 == 0 {
+                if k % 2 != 0 {
+                    result = -1;
+                    break;
+                }
+            } else {
+                if k % 2 != 1 {
+                    result += 1;
+                }
+            }
+
+            k = k / 2;
+            n = n / 2;
+        }
+
+        if k != 0 {
+            -1
+        } else {
+            result
+        }
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3226() {
+        assert_eq!(2, Solution::min_changes(13, 4));
+        assert_eq!(0, Solution::min_changes(21, 21));
+        assert_eq!(-1, Solution::min_changes(14, 13));
+        assert_eq!(-1, Solution::min_changes(11, 56));
+    }
+}