# 17.08.2025
[837. New 21 Game](https://leetcode.com/problems/new-21-game/description) medium
Probability sum of random(1..m) less than n when stop adding at k #medium #math #probability
[837. New 21 Game](https://leetcode.com/problems/new-21-game/description) medium
Probability sum of random(1..m) less than n when stop adding at k #medium #math #probability
👍1
# 18.08.2025
[679. 24 Game](https://leetcode.com/problems/24-game/description) hard
Can a,b,c,d = 24 with ops */+-() #hard #backtracking #math
[679. 24 Game](https://leetcode.com/problems/24-game/description) hard
Can a,b,c,d = 24 with ops */+-() #hard #backtracking #math
👍1
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# 06.09.2025
[3495. Minimum Operations to Make Array Elements Zero](https://leetcode.com/problems/minimum-operations-to-make-array-elements-zero/description) hard
Sum query [a..b] of optimal pairwise /4 until range is zero #hard #math
[3495. Minimum Operations to Make Array Elements Zero](https://leetcode.com/problems/minimum-operations-to-make-array-elements-zero/description) hard
Sum query [a..b] of optimal pairwise /4 until range is zero #hard #math
👍2
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# 24.09.2025
[166. Fraction to Recurring Decimal](https://leetcode.com/problems/fraction-to-recurring-decimal/description) medium
Calc a/b to string x.y(z) #medium #math
[166. Fraction to Recurring Decimal](https://leetcode.com/problems/fraction-to-recurring-decimal/description) medium
Calc a/b to string x.y(z) #medium #math
👍2