olymmath

JMO 2025 Problem 3

    Let nn be a positive integer. There exist nn ordered triples (x1,y1,z1),(x2,y2,z2),…,(xn,yn,zn)(x_1, y_1, z_1), (x_2, y_2, z_2), \dots, (x_n, y_n, z_n) where each coordinate is an integer between 11 and 100100 (inclusive), satisfying the following condition:

    [center] For every infinite sequence (a1,a2,a3,… )(a_1, a_2, a_3, \dots) of integers between 11 and 100100 , there exist a positive integer ii and an index jj (with 1⩽j⩽n1 \leqslant j \leqslant n ) such that (ai,ai+1,ai+2)=(xj,yj,zj)(a_i, a_{i+1}, a_{i+2}) = (x_j, y_j, z_j) . [/center]

    Determine the minimum possible value of nn .

    Dataset text AI-MO AoPS. Quoted with source.

    Official text: Japan Mathematical Olympiad 2025 official paper, page 2.

    Solutions

    No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.

    Add a solution

    Similar problems

    These problems have the most words in common with this statement.

    Locator jp-jmo/2025/p3 · Tag 79QQMCZQJK · Edit this page on GitHub · Keys: j next, k previous