Problems
Sum of digits#1681
Easy · Number theory
Spiderman#1682
Easy · Geometry
Tourist Routes#1683
Easy · Graphs · Dynamic programming
Mobile tariff "Cents"#1684
Very easy · Math
Lands of Antarctica#1685
Medium · Graphs · Greedy algorithms · Geometry · Graph matchings · Graph network flows
Fire#1686
Very easy · Math
Digits#1687
Easy · Number theory
Inheritance#1688
Medium · Geometry
Durak game#1689
Very easy · Implementation · Brute force
Test Work#1690
Very easy · Math
Numerical Intervals#1692
Easy · Implementation
Students - free of charge!#1695
Very easy · Probabilities
The magic number 23#1696
Very easy · Implementation
How to become a winner#1697
Very easy · Greedy algorithms
Vasya and his friends#1698
Hard · Dynamic programming
Segments on the line return#1699
Medium · Geometry
Segments on the Line Return-2#1700
Very hard · Geometry
Square Counting#1701
Hard · Number theory · Geometry
A Greener World#1702
Hard · Geometry · Math · Number theory
Left recursion#1703
Very easy · Implementation
Clever turtle#1704
Easy · Dynamic programming · Combinatorics
A Bit Sequence Puzzle#1705
Very easy · Brute force · Binary Search
Pinocchio#1706
Easy · Dynamic programming
Building with Blocks#1707
Medium · Graphs
Continuous Drawing#1709
Very hard · Graphs · Shortest paths · Graph matchings · Depth-first Search