{"raw_statement":[{"iden":"problem statement","content":"You are given nonnegative integers $a$ and $b$ ($a ≤ b$), and a positive integer $x$. Among the integers between $a$ and $b$, inclusive, how many are divisible by $x$?"},{"iden":"constraints","content":"*   $0 ≤ a ≤ b ≤ 10^{18}$\n*   $1 ≤ x ≤ 10^{18}$"},{"iden":"input","content":"The input is given from Standard Input in the following format:\n\n$a$ $b$ $x$"},{"iden":"sample input 1","content":"4 8 2"},{"iden":"sample output 1","content":"3\n\nThere are three integers between $4$ and $8$, inclusive, that are divisible by $2$: $4$, $6$ and $8$."},{"iden":"sample input 2","content":"0 5 1"},{"iden":"sample output 2","content":"6\n\nThere are six integers between $0$ and $5$, inclusive, that are divisible by $1$: $0$, $1$, $2$, $3$, $4$ and $5$."},{"iden":"sample input 3","content":"9 9 2"},{"iden":"sample output 3","content":"0\n\nThere are no integer between $9$ and $9$, inclusive, that is divisible by $2$."},{"iden":"sample input 4","content":"1 1000000000000000000 3"},{"iden":"sample output 4","content":"333333333333333333\n\nWatch out for integer overflows."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}