export function countPairsWithDiffK(numbers: number[], k: number): number {
  // Escribe tu solución aquí
  let pares: string[] =[];
  numbers.forEach(n1 => {
    numbers.forEach(n2 => {
      if(n1-n2 === k && !pares.includes(`${n1},${n2}`) && !pares.includes(`${n2},${n1}`)) pares.push(`${n1},${n2}`);
    })
  })
  return pares.length;
}