function formatDate(date: Date, format) {
  format = format.replace(/MM/g, ('0' + (date.getMonth() + 1)).slice(-2));
  format = format.replace(/dd/g, ('0' + date.getDate()).slice(-2));
  return format;
};

let date: Date = new Date(2015, 0, 1);
let dateStr: String;
let monthNum: number;
let dayNum10: number;
let dayNum01: number;
let answerCount: number = 0;

for (let dayCount = 0; dayCount < 365; dayCount++) {

  dateStr = formatDate(date, 'MMdd');
  monthNum = parseInt(dateStr.substr(0, 2))
  dayNum10 = parseInt(dateStr.substr(2, 1))
  dayNum01 = parseInt(dateStr.substr(3, 1))
  if (monthNum == dayNum10 + dayNum01) {
    answerCount++;
  }
  date.setDate(date.getDate() + 1);
}

console.log(answerCount);