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Bool return false if @roster.includes?(student) @roster << student @grades[grade] << student true end ","num_views":0,"num_stars":0,"num_comments":0,"representation_num_published_solutions":1,"num_iterations":1,"num_loc":18,"iteration_status":"no_automated_feedback","published_iteration_head_tests_status":"passed","published_at":"2026-08-13T15:01:22.000Z","is_out_of_date":false,"language":"crystal","author":{"handle":"swsch"},"exercise":{"title":"প্রাথমিক বিদ্যালয়","icon_url":"https://assets.exercism.org/exercises/grade-school.svg"},"track":{"title":"Crystal","icon_url":"https://assets.exercism.org/tracks/crystal.svg","highlightjs_language":"crystal"},"links":{"public_url":"https://exercism.org/bn/tracks/crystal/exercises/grade-school/solutions/swsch","private_iterations_url":"https://exercism.org/bn/tracks/crystal/exercises/grade-school/iterations"}}],"meta":{"current_page":1,"total_count":14,"total_pages":1,"unscoped_total":14}}}}}

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