2023

2023

learnign/learned

as of 13april, I ... havent done any of the below task,hope to clear up in april

• [10] multiple of i that is >= x
• [09] mersenne_prime
• [08] meissel-lehmer algorithm
• [07] modular-exponent
• [06] modular inverse for what again
• [05] create cpp snippet for nCr and nPr
• [04] finding-prime-factors
• [03] convert n distinct number in 1-n range
  • how to map distinct number in a range & what are benefits?
• [02] combination & permutation
• [01] stl uppwer_bound lower-bound

Toc

• March
• February
• January
• bal-sal

May

• 23-05-25

  • in rust (2 simple problem from dimiqoj)

• 23-05-06

  • in rust,
    • how to unpack array value into a variables?
    • recall how to read vector or int in rust?
    • on what data type ceil() & floor() exist?
    • how to do floor division of u32 in rust?
  • consider int a <= i,x,n <= 1^10,
    • find lowest multiple of i that is >= x?
    • find height multiple of i that is <= x?

• 23-05-05

  • in rust,

    • how to convert 🔥 to unicode value(aka u32)
    • how to convert the converted unicode back to char or string?

  • what is mersenne_prime ?

April

• 23-04-29

  • in rust,

    • how to find sum of a vector/map?
    • how to convert a each char in "323" to a digit?

• 23-04-28

  • red recall how to read a & parse a line of integer into a i32 array?
    • first step?
    • how many method need to call?

• 23-04-25

  • deno write in stdout without \n ?
  • deno input from usr?
  • rust b'A' vs 65 as u8 what is common?
  • how type works in rust?

• 23-04-23

  • how to take an array input in go?

• 23-04-21

  • how to find prime in rust?
  • find sqrt of number in rust?
  • find ln2 of a number in rust?
  • return vector from a function
  • return array from a function
  • container[x] here x has to be usize?
  • (1...100).step_by(2) to iterate all evens in 1..100
  • again > april

• 23-04-19

  • how OK() & Err() works ?
  • how stdin works in os ?

• 23-04-18

  • 🦀
  • matches!();
  • ch.is_alphabetic();
  • vec.push()
  • HashMap::new()
  • hashmap.insert()

• 23-04-17

  • stuff in rust🦀
    • array
    • iter()
    • cloned()
    • collect()
    • chars()

• 23-04-13

  • 1 problem solved from 52pack

• 23-04-12

  • 🔴 #1 no time for cp

• 23-04-11

  • 2 problem solved from 52pack

• 23-04-10

  • 🔴 #28 no time for cp

March

after 12 April, I was just lost

• 23-03-12(explanation)

  • E. Vlad and a Pair of Numbers
    • bitmask
    • again > mar

• 23-03-11

  • !! E. Vlad and a Pair of Numbers
    • solved on

• 23-03-09

  • B. interesting drink
    • again solved from
    • again > mar .. try without binary search & sorting in $O(n+q)$ complexity

• 23-03-08

  • D. Triangle Coloring
    • modular inverse combinatorics nCr
    • again > mar

• 23-03-07

  • !! D. Triangle Coloring
    • solved on
    • learn the combinatorics basics first

• 23-03-05

  • leetcode[day2]
  • B. K-th Beautiful String
    • again > mar
    • Also try to understand the implementation of editorial

• 23-03-04

  • D. Buying Shovels
    • implementation number-theory|math
    • again > mar

• 23-03-03(with-explanation)

  • !! D. Buying Shovels
    • own-explanation
    • solved on
  • C. Product of Three Numbers
    • again > march

• 23-03-02(with-explanation)

  • !! C. Product of Three Numbers
    • number-theory math
    • solved on on
    • how prime factors, factor are calculated fast ?
  • lc two-sum
    • two pointer
    • again solve using $O(n)$ complexity

• 23-03-01(with explanation)

  • B. random-teams
    • combinatorics graph own-explanation
    • again solve using connected components(graph theory)

February

• 23-02-28

  • B. Pashmak and Flowers
    • again review combinatorics
    • how and why $(n*(n-1))/2$ used for calculation ?

• 23-02-27

  • B. interesting drink
    • binary search
    • again solve & review binary search & uppwer_bound,lower_bound

january

missing

bal-sal

• 52 problem in rust