#![allow(non_snake_case)] #![allow(unused_imports)] //use itertools::Itertools; // use proconio::input; // use proconio::marker::*; use std::cmp::Reverse; use std::collections::*; fn main() { input! { n:usize, } const INF: usize = std::usize::MAX; let sqs = (1..).take_while(|&i| i * i <= n).collect::>(); let mut dp = vec![INF; n + 1]; dp[0] = 0; for i in 0..n { if dp[i] == INF { continue; } for &sq in sqs.iter() { if i + sq * sq > n { break; } dp[i + sq * sq] = dp[i + sq * sq].min(dp[i] + sq); } } let mut ls = vec![]; let mut yaba = n; while yaba > 0 { for &sq in sqs.iter() { if yaba < sq * sq { break; } if dp[yaba - sq * sq] + sq == dp[yaba] { ls.push(sq); yaba -= sq * sq; break; } } } ls.sort(); let mut ans = vec![0]; for &l in ls.iter() { let mut bin = *ans.last().unwrap(); for _ in 0..l { ans.push(bin); bin = 1 - bin; } } for ans in ans[1..].iter() { print!("{}", *ans); } println!(); } mod input { #[macro_export] macro_rules! input { (source = $s:expr, $($r:tt)*) => { let mut iter = $s.split_whitespace(); input_inner!{iter, $($r)*} }; ($($r:tt)*) => { let s = { use std::io::Read; let mut s = String::new(); std::io::stdin().read_to_string(&mut s).unwrap(); s }; let mut iter = s.split_whitespace(); input_inner!{iter, $($r)*} }; } #[macro_export] macro_rules! input_inner { ($iter:expr) => {}; ($iter:expr, ) => {}; ($iter:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($iter, $t); input_inner!{$iter $($r)*} }; } #[macro_export] macro_rules! read_value { ($iter:expr, ( $($t:tt),* )) => { ( $(read_value!($iter, $t)),* ) }; ($iter:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($iter, $t)).collect::>() }; ($iter:expr, chars) => { read_value!($iter, String).chars().collect::>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } }