20240822 Finished

src/problem/mod.rs

@@ -213,3 +213,4 @@ mod p551_student_attendance_record_i;
 mod p552_student_attendance_record_ii;
 mod p3154_find_number_of_ways_to_reach_the_k_th_stair;
 mod p3007_maximum_number_that_sum_of_the_prices_is_less_than_or_equal_to_k;
+mod p3133_minimum_array_end;

src/problem/p3133_minimum_array_end.rs

@@ -0,0 +1,43 @@
+/**
+ * [3133] Minimum Array End
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn min_end(n: i32, x: i32) -> i64 {
+        let (n, x) = (n as i64, x as i64);
+        let mut result = x;
+        
+        let bit_count = 128 - n.leading_zeros() - x.leading_zeros();
+        
+        let mut pos = 0;
+        
+        for i in 0..bit_count {
+            if (result >> i) & 1 == 0 {
+                if ((n - 1) >> pos) & 1 == 1 {
+                    result |= 1 << i;
+                }
+                
+                pos += 1;
+            }
+        }
+        
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3133() {
+        assert_eq!(6, Solution::min_end(3, 4));
+        assert_eq!(15, Solution::min_end(2, 7));
+    }
+}