Things to be careful of, to avoid WA

1. std::fixed for fp number.

   when cout of fp number, they might be scientific or fixed depending on number of decimals

2. std::cin delimits automatically by spaces.

3. std::cin can be chained

   std::cin >> a >> b;

   populates first and second token to a and b respectively

Things to be care of, to avoid TLE

1. Try calculating big O of algorithm
2. Try using simple hash
3. Try using DP

Shorthands that are useful

1. #define ii pair<int, int> storing two integers, useful in 2d-mazes. Access elements by first and second

2. #define vii vector<pair<int, int>> storing ii in vectors

Problems I’m able to solve

• math-based
• general knowledge
• dp

Problems I’m unable to solve

• advanced graphing
• pathing

Completion list

https://open.kattis.com/problems/password https://open.kattis.com/problems/batterup https://open.kattis.com/problems/howmanydigits (math) https://open.kattis.com/problems/lastfactorialdigit https://open.kattis.com/problems/juryjeopardy https://open.kattis.com/problems/phonelist (js/node) https://open.kattis.com/problems/display https://open.kattis.com/problems/sgcoin https://open.kattis.com/problems/anthonyanddiablo (math) https://open.kattis.com/problems/santaklas (math) https://open.kattis.com/problems/mastermind https://open.kattis.com/problems/stringmatching (string algo) https://open.kattis.com/problems/primesieve https://open.kattis.com/problems/robotturtles (maze/graph/hard edgecases) https://open.kattis.com/problems/inversefactorial (math) https://open.kattis.com/problems/cursethedarkness (math) https://open.kattis.com/problems/tsp (tsp, obviously) https://open.kattis.com/problems/toys (math) https://open.kattis.com/problems/secretsanta (math/hacks) https://open.kattis.com/problems/battlesimulation https://open.kattis.com/problems/ants

Uncompletion list

https://open.kattis.com/problems/thekingofthenorth (maze/graph)