1
/**
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 * @param {number} sx
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 * @param {number} sy
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 * @param {number} tx
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 * @param {number} ty
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 * @return {boolean}
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 */
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var reachingPoints = function (sx, sy, tx, ty) {
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  while (tx >= sx && ty >= sy) {
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    if (tx == ty) break;
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    if (tx > ty) {
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      if (ty > sy) tx %= ty;
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      else return (tx - sx) % ty == 0;
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    } else {
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      if (tx > sx) ty %= tx;
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      else return (ty - sy) % tx == 0;
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    }
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  }
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  return tx == sx && ty == sy;
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};