..
O（*sijqh898v9
- CodeForces 293B Distinct Paths
- CodeForces 263E Rhombus
- AtCoder abc147_f Sum Difference
- AtCoder abc168_f . (Single Dot)
- AtCoder abc200_f Minflip Summation
- AtCoder abc164_f I hate Matrix Construction
- AtCoder abc208_f Cumulative Sum
- AtCoder abc210_f Coprime Solitaire