Submission #401872

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Source Code Expand

// Generated by CoffeeScript 1.9.2
var Reader, main;

Reader = (function() {
  var data, iter, length;

  data = [];

  iter = -1;

  length = -1;

  function Reader(input) {
    data = input.split("\n").join(" ").split(" ");
    length = data.length;
    iter = -1;
  }

  Reader.prototype.n = function(l) {
    if (l == null) {
      l = 1;
    }
    if (l === 1) {
      if (++iter >= length) {
        console.log("配列外アクセス");
        return false;
      }
      return data[iter] ^ 0;
    }
  };

  Reader.prototype.s = function(l) {
    if (l == null) {
      l = 1;
    }
    if (l === 1) {
      if (++iter >= length) {
        console.log("配列外アクセス");
        return false;
      }
      return data[iter];
    }
  };

  return Reader;

})();

main = function(input) {
  var a, l, r, result;
  r = new Reader(input);
  result = 0;
  l = r.n();
  a = r.s();
  if (l % 2 === 0) {
    result = -1;
  } else if (((l - 1) / 2) % 3 === 1) {
    if (!(a.split('abc').join('') === '')) {
      result = -1;
    }
  } else if (((l - 1) / 2) % 3 === 2) {
    if (!(a[0] === 'c' && a[1] === 'a' && a.substring(2).split('bca').join('') === '')) {
      result = -1;
    }
  } else if (((l - 1) / 2) % 3 === 0) {
    if (!(a[0] === 'b' && a.substring(1).split('cab').join('') === '')) {
      result = -1;
    }
  }
  if (result !== -1) {
    result = (l - 1) / 2;
  }
  console.log(result);
};

main(require("fs").readFileSync("/dev/stdin", "utf8"));

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