#![allow(unused_imports)] #![allow(non_snake_case, unused)] // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { (source = $s:expr, $($r:tt)*) => { let mut iter = $s.split_whitespace(); let mut next = || { iter.next().unwrap() }; input_inner!{next, $($r)*} }; ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes .by_ref() .map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr, ) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, ( $($t:tt),* )) => { ( $(read_value!($next, $t)),* ) }; ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::>() }; ($next:expr, chars) => { read_value!($next, String).chars().collect::>() }; ($next:expr, usize1) => { read_value!($next, usize) - 1 }; ($next:expr, $t:ty) => { $next().parse::<$t>().expect("Parse error") }; } use std::io::Write; use std::collections::*; use std::cmp::*; use std::ops::*; use std::marker::*; const INF: i64 = std::i64::MAX/100; const MOD: i64 = 1_000_000_007; // const MOD: i64 = 998244353; fn main() { input! { n: (i64), } let mut ans = n; for j in 1..=60 { let x = (n as f64).powf(1.0/j as f64) as i64; for i in max(1,x-10000)..=x+10000 { let mut base = 1; for t in 0..j { base *= i; if base > n { break; } } if base <= n { ans = ans.min(i+j+n-base); } } } println!("{}",ans); }