const input = require("fs").readFileSync("/dev/stdin", "utf8")
const lines = input.split('\n')
const [N, M] = lines[0].split(' ').map(Number)
const A = lines[1].split(' ').map(Number)

const sum = A.reduce((a, b) => a + b)

const div = sum / (M * 4)

let count = 0
A.forEach(a => {
  count += a >= div ? 1 : 0
})

console.log(count >= M ? 'Yes' : 'No')