Interactive problems
19 problems to practice.
Lost Tree
https://codeforces.com/problemset/problem/1534/D
Manhattan Rectangle
https://www.codechef.com/FEB19B/problems/MANRECT
Bear And Prime 100
Check the link
Flamingoes Of Mystery
https://codeforces.com/problemset/problem/1425/F
Chocolate Bunny
https://codeforces.com/problemset/problem/1407/C
Lost Numbers
https://codeforces.com/problemset/problem/1167/B
Guess The Array
https://codeforces.com/problemset/problem/727/C
Guessing The Greatest Version
https://codeforces.com/contest/1486/problem/C1
Guess The Kth Zero
https://codeforces.com/problemset/problem/1520/F1
3 Coloring
https://codeforces.com/problemset/problem/1503/B
Rpd And Rap Sheet
https://codeforces.com/problemset/problem/1543/D1
Strange Device
https://codeforces.com/problemset/problem/1270/D
Pick Heroes
https://codeforces.com/contest/1056/problem/C
Kuroni And The Celebration
https://codeforces.com/contest/1305/problem/D
Tree Diameter
https://codeforces.com/problemset/problem/1146/C
Take A Guess
<a href="https://codeforces.com/problemset/problem/1556/D">https://codeforces.com/problemset/p...
Nastia And A Hidden Permutation
https://codeforces.com/problemset/problem/1521/C
Rocket
<a href="https://codeforces.com/problemset/problem/1010/B">https://codeforces.com/problemset/p...
Dwarves, Hats And Extrasensory Abilities
<a href="https://codeforces.com/problemset/problem/1063/C">https://codeforces.com/problemset/p...