#define header_file <bits/stdc++.h>
#include header_file
#define macro_definition typedef
#define semicolon ;
#define inaugurate using
#define newq namespace
#define memory_space std
#define long_definition long
#define definition int
#define main_functions main
#define opening_parenthesis (
#define closing_parenthesis )
#define left_brace {
#define closing_brace }
#define input cin
#define left_corner_number <<
#define right_corner_number >>
#define circulate for
#define equal_sign =
#define plus +
#define boolean bool
#define real true
#define greater_than1 <
#define less_than >
#define less_than_or_equal_to <=
#define greater_than_or_equal_to >=
#define evolution sqrt
#define judgment if
#define take_the_balance %
#define is_equal_to ==
#define fake false
#define quit break
#define output cout
#define line_breaks endl
#define self_reduction --
#define back return
#define variable1 ll
#define variable2 i
#define variable3 j
#define add_yourself ++
#define variable4 jube
#define variable5 n
#define num1 0
#define num2 2
#define num3 3

inaugurate newq memory_space semicolon
macro_definition long_definition long_definition variable1 semicolon
definition main_functions opening_parenthesis closing_parenthesis left_brace
variable1 variable5 semicolon
input right_corner_number variable5 semicolon
variable5 self_reduction semicolon
circulate opening_parenthesis variable1 variable2 equal_sign num3 semicolon semicolon variable2 equal_sign num2 plus variable2 closing_parenthesis left_brace
boolean variable4 equal_sign real semicolon
circulate opening_parenthesis variable1 variable3 equal_sign num2 semicolon variable3 less_than_or_equal_to evolution opening_parenthesis variable2 closing_parenthesis semicolon variable3 add_yourself closing_parenthesis left_brace
judgment opening_parenthesis variable2 take_the_balance variable3 is_equal_to num1 closing_parenthesis left_brace
variable4 equal_sign fake semicolon
quit semicolon
closing_brace
closing_brace
judgment opening_parenthesis variable4 closing_parenthesis left_brace
variable5 self_reduction semicolon
judgment opening_parenthesis variable5 is_equal_to num1 closing_parenthesis left_brace
output left_corner_number variable2 left_corner_number line_breaks semicolon
quit semicolon
closing_brace
closing_brace
closing_brace
back num1 semicolon
closing_brace