Ivan Shishkin, Rye (1878)

Problems/OtherUnreviewed

Le robot perdu dans la ville quadrillée

by visitor·
15
Difficulty scaleÉchelle de difficulté

This score reflects both the level of the required concepts and the difficulty of the solution.Ce score tient compte à la fois du niveau des notions nécessaires et de la difficulté de la résolution.

  1. 1–10First steps / middle schoolPremiers pas / collège
  2. 11–25Beginner / high schoolDébutant / lycée
  3. 26–50Intermediate / undergraduateIntermédiaire / licence
  4. 51–70Advanced / graduateAvancé / master
  5. 71–90Expert / specializedExpert / spécialisé
  6. 91–100Research levelNiveau recherche
These levels are approximate guides.Ces niveaux sont des repères approximatifs.
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This problem was submitted to “Little adventures”.

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À chaque pas, le robot passe d’un carrefour à un carrefour voisin, vers le nord, le sud, l’est ou l’ouest. Combien de promenades de 2 pas le ramènent au départ ? De 4 pas ? De 6 pas ? Trouver une formule.

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