Problems
Sum of Powers Version I#6067
Very easy · Math
Qurban 2011#6068
Very hard · Greedy algorithms · Implementation
Ride My Bicycle#6069
Easy · Sorting
Counting Sheep#6070
Very easy · Implementation
Sequence#6071
Very easy · Implementation
Untidy Desktops#6072
Easy · Geometry · Brute force
Picnic Planning#6073
Hard · Graphs · Greedy algorithms
Poly-polygonal Numbers#6074
Easy · Brute force · Priority Queue
Rational Approximation#6075
Hard · Matrix · Number theory · Combinatorics
Stacking Cubes#6076
Medium
Checker`s Check#6077
Very hard · Implementation
To Bet or Not To Bet#6078
Medium · Dynamic programming · Probabilities
BSP Trees#6079
Medium · Trees · Geometry
Double Trouble#6080
Easy · Brute force · Strings
"Metro"#6081
Easy · Math · Constructive Algorithms
Supernatural#6082
Very easy · Dynamic programming
Pieces of Paper#6083
Hard · Disjoint set union · Graphs
Nested rectangles#6084
Hard · Dynamic programming
Turns minimization#6085
Easy · Graphs
Same quantity, sum and product#6086
Easy · Combinatorics
A Cycle of Points#6087
Medium · Data Structures · Brute force · Geometry
Sum#6088
Very easy · Math · Prefix Sums
Desoxyribonucleic Acid#6089
Very easy · Data Structures · Hashing
Easy Recurrence#6090
Hard · Dynamic programming
Control Block#6100
Very easy · Prefix Sums · Math