// ---------- begin input macro ---------- // reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 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_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_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, bytes) => { read_value!($iter, String).bytes().collect::>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } // ---------- end input macro ---------- fn run() { input! { n: usize, m: usize, e: [(usize1, usize1, i64); m], } let mut e = e; e.sort_by_key(|e| e.2); let mut g = vec![vec![]; n]; for &(a, b, _) in e.iter() { g[a].push((b, 1)); } g.iter_mut().for_each(|g| g.sort()); let inf = 100; let mut dp = vec![inf; n]; dp[0] = 0; let mut q = std::collections::VecDeque::new(); q.push_back(0); while let Some(v) = q.pop_front() { let d = dp[v] + 1; for &(u, _) in g[v].iter() { if dp[u] > d { dp[u] = d; q.push_back(u); } } } let mut ans = vec![inf; n]; for &(s, t, w) in e.iter() { if dp[s] == inf { continue; } let x = g[s].binary_search(&(t, 1)).unwrap(); g[s][x].1 = -1; let mut update = vec![false; n]; let mut minus = vec![false; n]; let mut q = std::collections::VecDeque::new(); q.push_back(s); while let Some(v) = q.pop_front() { let d = dp[v]; for &(u, w) in g[v].iter() { let d = d + w; if d <= dp[u] { if update[u] { minus[u] = true; } else { dp[u] = d; update[u] = true; q.push_back(u); } } } } for i in 0..n { if minus[i] { q.push_back(i); } } while let Some(v) = q.pop_front() { for &(u, _) in g[v].iter() { if !minus[u] { minus[u] = true; q.push_back(u); } } } for i in 0..n { if minus[i] || dp[i] <= 0 { ans[i] = ans[i].min(w); } } } for a in ans[1..].iter() { if *a == inf { println!("-1"); } else { println!("{}", *a); } } } fn main() { run(); }