{"raw_statement":[{"iden":"problem statement","content":"We have held a popularity poll for $N$ items on sale. Item $i$ received $A_i$ votes.\nFrom these $N$ items, we will select $M$ as popular items. However, we cannot select an item with less than $\\dfrac{1}{4M}$ of the total number of votes.\nIf $M$ popular items can be selected, print `Yes`; otherwise, print `No`."},{"iden":"constraints","content":"*   $1 \\leq M \\leq N \\leq 100$\n*   $1 \\leq A_i \\leq 1000$\n*   $A_i$ are distinct.\n*   All values in input are integers."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$ $M$\n$A_1$ $...$ $A_N$"},{"iden":"sample input 1","content":"4 1\n5 4 2 1"},{"iden":"sample output 1","content":"Yes\n\nThere were $12$ votes in total. The most popular item received $5$ votes, and we can select it."},{"iden":"sample input 2","content":"3 2\n380 19 1"},{"iden":"sample output 2","content":"No\n\nThere were $400$ votes in total. The second and third most popular items received less than $\\dfrac{1}{4\\times 2}$ of the total number of votes, so we cannot select them. Thus, we cannot select two popular items."},{"iden":"sample input 3","content":"12 3\n4 56 78 901 2 345 67 890 123 45 6 789"},{"iden":"sample output 3","content":"Yes"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}