{"raw_statement":[{"iden":"problem statement","content":"Takahashi has $K$ $500$\\-yen coins. (Yen is the currency of Japan.) If these coins add up to $X$ yen or more, print `Yes`; otherwise, print `No`."},{"iden":"constraints","content":"*   $1 \\leq K \\leq 100$\n*   $1 \\leq X \\leq 10^5$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$K$ $X$"},{"iden":"sample input 1","content":"2 900"},{"iden":"sample output 1","content":"Yes\n\nTwo $500$\\-yen coins add up to $1000$ yen, which is not less than $X = 900$ yen."},{"iden":"sample input 2","content":"1 501"},{"iden":"sample output 2","content":"No\n\nOne $500$\\-yen coin is worth $500$ yen, which is less than $X = 501$ yen."},{"iden":"sample input 3","content":"4 2000"},{"iden":"sample output 3","content":"Yes\n\nFour $500$\\-yen coins add up to $2000$ yen, which is not less than $X = 2000$ yen."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}