// ---------- begin max flow (Dinic) ---------- mod maxflow { pub trait MaxFlowCapacity: Copy + Ord + std::ops::Add + std::ops::Sub { fn zero() -> Self; fn inf() -> Self; } macro_rules! impl_primitive_integer_capacity { ($x:ty, $y:expr) => { impl MaxFlowCapacity for $x { fn zero() -> Self { 0 } fn inf() -> Self { $y } } }; } impl_primitive_integer_capacity!(u32, std::u32::MAX); impl_primitive_integer_capacity!(u64, std::u64::MAX); impl_primitive_integer_capacity!(i32, std::i32::MAX); impl_primitive_integer_capacity!(i64, std::i64::MAX); #[derive(Clone)] struct Edge { to_: u32, inv_: u32, cap_: Cap, } impl Edge { fn new(to: usize, inv: usize, cap: Cap) -> Self { Edge { to_: to as u32, inv_: inv as u32, cap_: cap, } } fn to(&self) -> usize { self.to_ as usize } fn inv(&self) -> usize { self.inv_ as usize } } impl Edge { fn add(&mut self, cap: Cap) { self.cap_ = self.cap_ + cap; } fn sub(&mut self, cap: Cap) { self.cap_ = self.cap_ - cap; } fn cap(&self) -> Cap { self.cap_ } } pub struct Graph { graph: Vec>>, } #[allow(dead_code)] pub struct EdgeIndex { src: usize, dst: usize, x: usize, y: usize, } impl Graph { pub fn new(size: usize) -> Self { Self { graph: vec![vec![]; size], } } pub fn add_edge(&mut self, src: usize, dst: usize, cap: Cap) -> EdgeIndex { assert!(src.max(dst) < self.graph.len()); assert!(cap >= Cap::zero()); assert!(src != dst); let x = self.graph[src].len(); let y = self.graph[dst].len(); self.graph[src].push(Edge::new(dst, y, cap)); self.graph[dst].push(Edge::new(src, x, Cap::zero())); EdgeIndex { src, dst, x, y } } // src, dst, used, intial_capacity #[allow(dead_code)] pub fn get_edge(&self, e: &EdgeIndex) -> (usize, usize, Cap, Cap) { let max = self.graph[e.src][e.x].cap() + self.graph[e.dst][e.y].cap(); let used = self.graph[e.dst][e.y].cap(); (e.src, e.dst, used, max) } pub fn flow(&mut self, src: usize, dst: usize) -> Cap { let size = self.graph.len(); assert!(src.max(dst) < size); assert!(src != dst); let mut queue = std::collections::VecDeque::new(); let mut level = vec![0; size]; let mut it = vec![0; size]; let mut ans = Cap::zero(); loop { (|| { level.clear(); level.resize(size, 0); level[src] = 1; queue.clear(); queue.push_back(src); while let Some(v) = queue.pop_front() { let d = level[v] + 1; for e in self.graph[v].iter() { let u = e.to(); if e.cap() > Cap::zero() && level[u] == 0 { level[u] = d; if u == dst { return; } queue.push_back(u); } } } })(); if level[dst] == 0 { break; } it.clear(); it.resize(size, 0); loop { let f = self.dfs(dst, src, Cap::inf(), &mut it, &level); if f == Cap::zero() { break; } ans = ans + f; } } ans } fn dfs(&mut self, v: usize, src: usize, cap: Cap, it: &mut [usize], level: &[u32]) -> Cap { if v == src { return cap; } while let Some((u, inv)) = self.graph[v].get(it[v]).map(|p| (p.to(), p.inv())) { if level[u] + 1 == level[v] && self.graph[u][inv].cap() > Cap::zero() { let cap = cap.min(self.graph[u][inv].cap()); let c = self.dfs(u, src, cap, it, level); if c > Cap::zero() { self.graph[v][it[v]].add(c); self.graph[u][inv].sub(c); return c; } } it[v] += 1; } Cap::zero() } } } // ---------- end max flow (Dinic) ---------- fn read() -> Vec> { let mut s = String::new(); use std::io::Read; std::io::stdin().read_to_string(&mut s).unwrap(); let mut it = s.trim().split_whitespace(); it.next(); it.next(); it.map(|s| s.chars().collect::>()).collect() } fn main() { let s = read(); if s.iter().flatten().all(|c| *c == '.') { println!("Yes"); for _ in 0..s.len() { println!("{}", ".".repeat(s[0].len())); } return; } let mut cond = true; cond &= s.iter().all(|s| !s.iter().all(|s| *s == '#')); let x = s.iter().rposition(|s| s.iter().all(|s| *s == '.')).map_or(0, |x| x + 1); cond &= s[..x].iter().flatten().all(|c| *c == '.'); if !cond { println!("No"); return; } let (h, w) = (s.len(), s[0].len()); let cnt = h - x; for i in 0usize..(1 << h) { if i.count_ones() as usize + cnt > h { continue; } let mut board = vec![vec!['.'; w]; h]; let mut p = h - 1; for (j, b) in board.iter_mut().rev().enumerate() { if i >> j & 1 == 1 { *b = vec!['#'; w]; } else if s[p].iter().any(|s| *s == '#') { *b = s[p].clone(); p -= 1; } } let s = &board; let mut g = maxflow::Graph::new(h * w + 2); let src = h * w; let dst = src + 1; let mut edge = vec![]; for i in 0..h { for j in 0..w { if s[i][j] == '.' { continue; } if (i + j) & 1 == 0 { g.add_edge(i * w + j, dst, 1); } else { g.add_edge(src, i * w + j, 1); for &(x, y) in [(i - 1, j), (i + 1, j), (i, j - 1), (i, j + 1)].iter() { if x < h && y < w && s[x][y] == '#' { edge.push(g.add_edge(i * w + j, x * w + y, 1)); } } } } } let count = s.iter().flatten().filter(|c| **c == '#').count() as u32; let flow = g.flow(src, dst); if 2 * flow == count { let mut op = vec![]; op.extend(b'a'..=b'z'); op.extend(b'A'..=b'Z'); let mut x = 0; let mut ans = vec![vec![b'.'; w]; h]; for e in edge.iter() { let (s, t, u, _) = g.get_edge(e); if u == 1 { let c = op[x]; x += 1; ans[s / w][s % w] = c; ans[t / w][t % w] = c; } } println!("Yes"); for ans in ans { let ans = ans.into_iter().map(|c| c as char).collect::(); println!("{}", ans); } return; } } println!("No"); }