With balanced ternary representation, positive and negative numbers can all be represented without a minus sign. Also, rounding is the same as truncation.

Combinatorics: The Art of Counting by Bruce Sagan PDF: users.math.msu.edu/users/bsagan/B…

The sum of the inradii is the same for all triangulations of a cyclic polygon. Example of a Japanese Sangaku problem. johndcook.com/blog/2025/11/0…

Two nodes x and y in a directed graph are strongly connected if there is a path from x to y and a path from y to x.

Problema de la Semana CCPL 2. Se te da una cuadrícula NxM con celdas libres (.) y paredes (#). Desde S puedes moverte en 4 direcciones. Puedes romper UNA pared para avanzar. ¿Cuál es el mínimo número de pasos para llegar a T? (1 ≤ N, M ≤ 1000) ¿Qué algoritmo usarías? #ICPCNews

A simple proof that π is irrational.

☕💬 ¡En 2026 seguimos activos con los #TechTalks! Acompáñanos a conocer cómo Java sigue siendo relevante en la industria y por qué vale la pena comenzar (o continuar 😉) una ruta de aprendizaje. 🗓️ Jueves 12/02/2026 🕕 6 PM (GMT-6) 🔴 facebook.com/events/1211538…

El autor de este post, que es neurocientífico, explica la razón real por la que la ciencia está rota: por culpa de unos incentivos institucionales perversos que priorizan la producción medible por encima del progreso real. Los investigadores deben autofinanciarse con becas (o

"Math for Programming: Learn the Math, Write Better Code" by Ronald T. Kneusel nostarch.com/math-programmi… Contents: 1. Computers and Numbers 2. Sets and Abstract Algebra 3. Boolean Algebra 4. Functions and Relations 5. Induction 6. Recurrence and Recursion 7. Number

For 38 years, computer scientists believed Dijkstra's algorithm was optimal for sparse graphs. The logic seemed airtight: Dijkstra sorts vertices by distance. Sorting has a lower bound of O(n log n). Therefore shortest paths can't be faster. 5 researchers proved the assumption

CCPL2026 Rafael García ICPCNews It only works because the weights in outbound edges are guaranteed to be either 0 or 1. If you had more possibilities, then the dequeue trick wouldn't work.

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Puedes consultar el Calendario de Actividades #CCPL2026 en programmingleague.org/item/articulo/…. ICPCNews Acis Redis