{"raw_statement":[{"iden":"problem statement","content":"Determine if we can choose $K$ different integers between $1$ and $N$ (inclusive) so that no two of them differ by $1$."},{"iden":"constraints","content":"*   $1\\leq N,K\\leq 100$\n*   $N$ and $K$ are integers."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$ $K$"},{"iden":"sample input 1","content":"3 2"},{"iden":"sample output 1","content":"YES\n\nWe can choose $1$ and $3$."},{"iden":"sample input 2","content":"5 5"},{"iden":"sample output 2","content":"NO"},{"iden":"sample input 3","content":"31 10"},{"iden":"sample output 3","content":"YES"},{"iden":"sample input 4","content":"10 90"},{"iden":"sample output 4","content":"NO"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}