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# Category Archives: Spain

## [Soln] 2015 Spain MO Day 1 Problem 1

2015 Spain MO 1.1. On the graph of a polynomial with integer coefficients, two points are chosen with integer coordinates. Prove that if the distance between them is an integer, then the segment that connects them is parallel to the horizontal axis. … Continue reading

## 2015 Spain MO Day 1 Problem 1

2015 Spain MO 1.1. On the graph of a polynomial with integer coefficients, two points are chosen with integer coordinates. Prove that if the distance between them is an integer, then the segment that connects them is parallel to the horizontal axis.