Solution for week of Nov. 19

Difficulty: Medium

Solution for week of Nov. 12

Difficulty: Easy

Solution for week of Nov. 5

Difficulty: Hard

Solution for week of Oct. 29

Difficulty: Medium

Solution for week of Oct. 22

Difficulty: Easy

Solution for week of Oct. 15

Difficulty: Hard

Solution for week of Oct. 8

Difficulty: Medium

Solution for week of Oct. 1

Difficulty: Easy

Solution for week of Sept. 24

Difficulty: Hard