function Main(input) {
  const YEAR = 2015
  let count = 0
  for (let month = 1; month <= 12; month++) {
    const lastDay = new Date(YEAR, month, 0).getDate()
    for (let day = 1; day <= lastDay; day++) {
      const nums = String(day).split("")
      let sum = 0
      nums.forEach((num) => {sum += Number(num)})
      if (month === sum) count++
    }
  }
  console.log(count)
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"))