{"raw_statement":[{"iden":"problem statement","content":"Given is an integer $N$.\nTakahashi chooses an integer $a$ from the positive integers not greater than $N$ with equal probability.\nFind the probability that $a$ is odd."},{"iden":"constraints","content":"*   $1 \\leq N \\leq 100$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$"},{"iden":"sample input 1","content":"4"},{"iden":"sample output 1","content":"0.5000000000\n\nThere are four positive integers not greater than $4$: $1$, $2$, $3$, and $4$. Among them, we have two odd numbers: $1$ and $3$. Thus, the answer is $\\frac{2}{4} = 0.5$."},{"iden":"sample input 2","content":"5"},{"iden":"sample output 2","content":"0.6000000000"},{"iden":"sample input 3","content":"1"},{"iden":"sample output 3","content":"1.0000000000"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}