Brain Booster #7

Welcome to the #7 th round of "Brain Booster" programming contest.

Please click on "attend contest" to confirm registration.

Problem
#1: P1121 Square Counting Challenge
#2: P1113 Fliping Game
#3: P1120 Stairway to the Skyline
#4: P1114 Maximize the MEX
#5: P1110 Subsequence of AB
#6: P1128 Roy and Product
#7: P1111 Thakurs tree game
#8: P1103 The Secret Garden of Numbers

Problem