提出 #42138506

---

ソースコード 拡げる

func main() {
  var scanner = Scanner()
  let N = scanner.read(Int.self)
  let M = scanner.read(Int.self)
  let K = scanner.read(Int.self)
  var G = [[Int]](repeating: [], count: N)
  for _ in 0 ..< M {
    let a = scanner.read(Int.self) - 1
    let b = scanner.read(Int.self) - 1
    G[a].append(b)
    G[b].append(a)
  }
  var E = [[Int]](repeating: [], count: N + 1)
  for i in 0 ..< K {
    let p = scanner.read(Int.self) - 1
    let h = scanner.read(Int.self)
    E[h].append(p)
  }
  var queue = [Int]()
  var inQueue = [Bool](repeating: false, count: N)
  var visited = [Bool](repeating: false, count: N)
  for h in (0 ... N).reversed() {
    var nextQueue = [Int]()
    for u in queue {
      inQueue[u] = false
      for v in G[u] {
        if !visited[v] {
          visited[v] = true
          inQueue[v] = true
          nextQueue.append(v)
        }
      }
    }
    queue = nextQueue
    for p in E[h] {
      if !visited[p] && !inQueue[p] {
        queue.append(p)
        inQueue[p] = true
        visited[p] = true
      }
    }
  }
  var answer = [Int]()
  for i in 0 ..< N {
    if visited[i] {
      answer.append(i)
    }
  }
  print(answer.count)
  print(answer.map { $0 + 1 }.map(\.description).joined(separator: " "))
}

main()

struct Scanner {
  private var tokens = [String]()
  private var index = 0
  
  mutating func read<T>(_ type: T.Type) -> T where T: LosslessStringConvertible {
    T(read())!
  }
  
  mutating func read<T>(_ type: T.Type, count n: Int) -> [T] where T: LosslessStringConvertible {
    (0 ..< n).map { _ in read(type) }
  }
  
  private mutating func read() -> String {
    while tokens.count == index {
      tokens = readLine()!.split(separator: " ").map(\.description)
      index = 0
    }
    defer {
      index += 1
    }
    return tokens[index]
  }
}

提出情報

コンパイルエラー

./Main.swift:14:7: warning: immutable value 'i' was never used; consider replacing with '_' or removing it
  for i in 0 ..< K {
      ^
      _

ジャッジ結果