People in Silverland use square coins. Not only they have square shapes but also their values are square numbers. Coins with values of all square numbers up to 289 (=17^2), i.e., 1-credit coins, 4-credit coins, 9-credit coins, …, and 289-credit coins, are available in Silverland. There are four combinations of coins to pay ten credits: ten 1-credit coins,one 4-credit coin and six 1-credit coins,two 4-credit coins and two 1-credit coins, andone 9-credit coin and one 1-credit coin. Your mission is to count the number of ways to pay a given amount using coins of Silverland.
，这些那些，我们是多么的了然于心，却依然，没有任何办法。
