20240901 finished.
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@ -222,3 +222,4 @@ mod p3144_minimum_substring_partition_of_equal_character_frequency;
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mod p3142_check_if_grid_satisfies_conditions;
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mod p3153_sum_of_digit_differences_of_all_pairs;
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mod p3127_make_a_square_with_the_same_color;
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mod p1450_number_of_students_doing_homework_at_a_given_time;
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@ -0,0 +1,46 @@
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/**
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* [1450] Number of Students Doing Homework at a Given Time
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*/
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pub struct Solution {}
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// submission codes start here
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impl Solution {
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pub fn busy_student(start_time: Vec<i32>, end_time: Vec<i32>, query_time: i32) -> i32 {
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let start_pos = start_time.iter().enumerate().filter_map(
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|(pos, &value)| {
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if value <= query_time {
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Some(pos)
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} else {
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None
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}
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}
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);
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let pos = start_pos.filter_map(
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|pos| {
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if end_time[pos] >= query_time {
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Some(pos)
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} else {
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None
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}
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}
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);
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pos.count() as i32
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}
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}
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// submission codes end
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_1450() {
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assert_eq!(1, Solution::busy_student(vec![1, 2, 3], vec![3, 2, 7], 4));
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assert_eq!(1, Solution::busy_student(vec![4], vec![4], 4));
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}
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}
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