- Cut Length Geomtry Problem F
- Edge Coloring in Bipartite Graph Problem F
- Minimum spanning tree for each edge
- Frogs and mosquitoes
- Expensive Strings
- Sorted and Sorted
- Complete Compress
- Xor Shift -- (String Algorithm , Check CPC for the other explaination)
- Xors on Segments
- The Sum of the k-th Powers
- Thief in a Shop ---- ( FFT )
- Magic Matrix
- Ants on a Circle
- Four Divisors
- Lena and Queries