{"raw_statement":[{"iden":"problem statement","content":"Given is a positive integer $N$.  \nFind the number of pairs $(A, B)$ of positive integers not greater than $N$ that satisfy the following condition:\n\n*   When $A$ and $B$ are written in base ten without leading zeros, the last digit of $A$ is equal to the first digit of $B$, and the first digit of $A$ is equal to the last digit of $B$."},{"iden":"constraints","content":"*   $1 \\leq N \\leq 2 \\times 10^5$\n*   All values in input are integers."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$N$"},{"iden":"sample input 1","content":"25"},{"iden":"sample output 1","content":"17\n\nThe following $17$ pairs satisfy the condition: $(1,1)$, $(1,11)$, $(2,2)$, $(2,22)$, $(3,3)$, $(4,4)$, $(5,5)$, $(6,6)$, $(7,7)$, $(8,8)$, $(9,9)$, $(11,1)$, $(11,11)$, $(12,21)$, $(21,12)$, $(22,2)$, and $(22,22)$."},{"iden":"sample input 2","content":"1"},{"iden":"sample output 2","content":"1"},{"iden":"sample input 3","content":"100"},{"iden":"sample output 3","content":"108"},{"iden":"sample input 4","content":"2020"},{"iden":"sample output 4","content":"40812"},{"iden":"sample input 5","content":"200000"},{"iden":"sample output 5","content":"400000008"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}