Problems

Topics
Central Element#523

Very hard · Interactive

Intriguing Selection#9588

Very hard · Interactive · Sorting · Greedy algorithms · Constructive Algorithms

Guess the number#10435

Very easy · Interactive

Guess the permutation#10449

Medium · Interactive · Binary Search

Two cookies#10660

Easy · Interactive

Politicians and Programmers#10819

Hard · Interactive · Constructive Algorithms · Math

Imprecise Permutation Sort#11140

Very hard · Sorting · Constructive Algorithms · Greedy algorithms · Interactive

Distance To Special Point#11311

Easy · Interactive · Math · Constructive Algorithms

Find The Lap Length#11313

Medium · Interactive · Binary Search · Math

Hot and Cold#11327

Easy · Interactive · Binary Search · Geometry

Interactive Factorial Guessing#11328

Very easy · Interactive · Constructive Algorithms · Greedy algorithms · Math

Guess the Number#11355

Easy · Binary Search · Interactive

Квадрат чи прямокутник#11370

Easy · Interactive · Binary Search

Guess the tree#11769

Very hard · Interactive · Trees · Randomized algorithms · Combinatorics · Graphs

Finding 67#12267

Very hard · Interactive · Binary Search · Constructive Algorithms · Strings

Nim-Yum-Yum#12352

Medium · Games · Interactive

Number of Distinct Numbers#12448

Very hard · Interactive · Constructive Algorithms · Randomized algorithms

interactive-gcd-xor#12469

Very hard · Interactive · Number theory