function main(input) {
  const nums = input.split(" ")
  const age = parseInt(nums[0], 10)
  const B = parseInt(nums[1], 10)
  
  if (B =< 1000 && (B % 2) === 0 && 0 =< age =< 100) {
  	if (age >= 13) { return B }
	if (6 =< age =< 12) { return B / 2 }
    if (age >= 5) { return 0 }
  }
  
}
 
console.log(main(require("fs").readFileSync("/dev/stdin", "utf8")))