20240902 finished.

src/problem/mod.rs

@@ -223,3 +223,4 @@ mod p3142_check_if_grid_satisfies_conditions;
 mod p3153_sum_of_digit_differences_of_all_pairs;
 mod p3127_make_a_square_with_the_same_color;
 mod p1450_number_of_students_doing_homework_at_a_given_time;
+mod p2024_maximize_the_confusion_of_an_exam;

src/problem/p2024_maximize_the_confusion_of_an_exam.rs

@@ -0,0 +1,53 @@
+/**
+ * [2024] Maximize the Confusion of an Exam
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn max_consecutive_answers(answer_key: String, k: i32) -> i32 {
+        let str : Vec<char> = answer_key.chars().collect();
+        
+        Self::max_consecutive_char(&str, k, 'T').max(Self::max_consecutive_char(&str, k, 'F'))
+    }
+    
+    fn max_consecutive_char(str: &Vec<char>, k: i32, c : char) -> i32 {
+        let n = str.len();
+        let mut result = 0;
+        
+        let (mut left, mut sum) = (0, 0);
+        for right in 0..n {
+            sum += match str[right] == c {
+                true => 0,
+                false => 1
+            };
+
+            while sum > k {
+                sum -= match str[left] == c {
+                    true => 0,
+                    false => 1
+                };
+                left += 1;
+            }
+            
+            result = result.max(right - left + 1);
+        }
+        
+        result as i32
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_2024() {
+        assert_eq!(4, Solution::max_consecutive_answers("TTFF".to_owned(), 2));
+        assert_eq!(3, Solution::max_consecutive_answers("TFFT".to_owned(), 1));
+    }
+}