Problems
Polygon#151
Very easy · Geometry
New Year's Gifts - 2#152
Easy · Math
Two rectangles#153
Easy · For Beginners
Pieces - 2#154
Medium · Dynamic programming
Scientific Project#155
Easy · Graphs
Two-dimensional domino#156
Easy · Implementation
Zoo#157
Very easy · For Beginners · Math
New Fibonacci Sequence#158
Medium · Dynamic programming
Holiday#159
Easy · Implementation
Dancing school#160
Medium · Prefix Sums · Math
Robots#161
Easy · Greedy algorithms
Unlucky Numbers#162
Very hard · Dynamic programming
Happy Numbers#163
Hard · Number theory · Brute force
Postcards#164
Very hard · Geometry
Symmetry#165
Very easy · Math
Street Racing#166
Medium · Binary Search · Greedy algorithms · Optimization · Math
Progressions#167
Medium · Math
Rushed Student#168
Medium · Math · Implementation
Skyscrapers#169
Easy · Brute force · Implementation
Bag of fake money#170
Hard · Math · Combinatorics · Greedy algorithms · Number theory
Traffic jams#171
Hard · Graphs · Implementation
Data Transfer#172
Hard · Implementation
UML Syntax#173
Hard · Graphs
Cities - Competitors#174
Easy · Graphs
Traffic Lights#175
Medium · Graphs · Shortest paths