# 資讀第一屆聖誕交換題目
* https://codeforces.com/contest/1842/problem/C - Darren
* https://codeforces.com/contest/1672/problem/E - Darren
* https://tioj.ck.tp.edu.tw/problems/1994 - viεcon
* https://tioj.ck.tp.edu.tw/problems/2231 - GrandTiger1729
* https://hackmd.io/@ChiuChiuCircle/rJLvYD_vT 聖誕老公公的真面目 -ChiuChiuCircle
* https://codeforces.com/problemset/problem/1867/D - koukirocks
* https://codeforces.com/problemset/problem/706/D - ting39
* https://csacademy.com/contest/archive/task/increasing_subarrays - tian
* https://hackmd.io/@iFrvTWckRQ-AEnwRqwdS4w/HkL7T_KPp - huacat1017
* https://hackmd.io/@BigIanXD/rJ1ZzFFPa 聖誕老公公的多項式 - bigianxd