题目 | Serval and Shift-Shift-Shift
Codeforces Round #853 (Div. 2)
D. Serval and Shift-Shift-Shift
题目 | ± Increasing Sequence
AtCoder Regular Contest 153
C - ± Increasing Sequence
Codeforces Round #853 (Div. 2)
D. Serval and Shift-Shift-Shift
AtCoder Regular Contest 153
C - ± Increasing Sequence