[프로그래머스/js] 영어 끝말잇기

https://programmers.co.kr/learn/courses/30/lessons/12981

프로그래머스

 

function solution(n, words) {
  var answer = [];
  var arr = [words[0]];

  for (var i = 1; i < words.length; i++) {
    if (
      arr[arr.length - 1][arr[arr.length - 1].length - 1] != words[i][0] ||
      arr.indexOf(words[i]) != -1
    ) {
      if (i % n == 0) {
        answer.push(1, parseInt(i / n) + 1);
      } else {
        answer.push((i % n) + 1, parseInt(i / n) + 1);
      }
      break;
    }
    arr.push(words[i]);
  }

  if (answer.length == 0) {
    answer.push(0, 0);
  }

  return answer;
}