#667146 (D) No.821 Making Integers

• 問題: No.821 Making Integers
• ユーザー: te-sh
• 提出日時: 2021-06-17 17:09:55
• 言語: D (dmd 2.109.1)
• 結果: AC
• 実行時間: 1 ms / 2,000 ms
• コード長: 2,523 bytes
• コンパイル時間: 1,637 ms
• コンパイル使用メモリ: 174,568 KB
• 実行使用メモリ: 6,940 KB
• 最終ジャッジ日時: 2024-06-22 11:34:03
• 合計ジャッジ時間: 1,742 ms
• ジャッジサーバーID （参考情報）: judge3 / judge4

ファイルパターン	結果
other	AC * 9

ソースコード

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// URL: https://yukicoder.me/problems/no/821
import std;
version(unittest) {} else
void main()
{
  long N, K; io.getV(N, K);
  io.put(N*(N+1)/2 - (N-K)*(N-K+1)/2 + 1);
}
auto io = IO!()();
struct IO(alias IN = stdin, alias OUT = stdout)
{
  import core.stdc.stdlib : exit;
  void getV(T...)(ref T v)
  {
    foreach (ref w; v) get(w);
  }
  void getA(T)(size_t n, ref T v)
    if (hasAssignableElements!T)
  {
    v = new T(n);
    foreach (ref w; v) get(w);
  }
  void getC(T...)(size_t n, ref T v)
    if (allSatisfy!(hasAssignableElements, T))
  {
    foreach (ref w; v) w = new typeof(w)(n);
    foreach (i; 0..n) foreach (ref w; v) get(w[i]);
  }
  void getM(T)(size_t r, size_t c, ref T v)
    if (hasAssignableElements!T && hasAssignableElements!(ElementType!T))
  {
    v = new T(r);
    foreach (ref w; v) getA(c, w);
  }
  template getS(E...)
  {
    void getS(T)(size_t n, ref T v)
    {
      v = new T(n);
      foreach (ref w; v) foreach (e; E) mixin("get(w."~e~");");
    }
  }
  const struct PutConf
  {
    bool newline = true, flush, exit;
    string floatFormat = "%.10f", delimiter = " ";
  }
  void put(alias conf = "{}", T...)(T v)
  {
    putMain!conf(v);
  }
  void putB(alias conf = "{}", S, T)(bool c, S t, T f)
  {
    if (c) put!conf(t);
    else put!conf(f);
  }
  void putRaw(T...)(T v)
  {
    OUT.write(v);
    OUT.writeln;
  }
  private
  {
    dchar[] buf;
    auto sp = (new dchar[](0)).splitter;
    void nextLine()
    {
      IN.readln(buf);
      sp = buf.splitter;
    }
    void get(T)(ref T v)
    {
      if (sp.empty) nextLine();
      v = sp.front.to!T;
      sp.popFront();
    }
    void putMain(alias conf, T...)(T v)
    {
      mixin("const PutConf c = "~conf~";");
      foreach (i, w; v) {
        putOne!conf(w);
        if (i+1 < v.length) OUT.write(c.delimiter);
      }
      static if (c.newline) OUT.writeln;
      static if (c.flush) OUT.flush();
      static if (c.exit) exit(0);
    }
    void putOne(alias conf, T)(T v)
    {
      mixin("const PutConf c = "~conf~";");
      static if (isInputRange!T && !isSomeString!T) putRange!conf(v);
      else static if (isFloatingPoint!T) OUT.write(format(c.floatFormat, v));
      else static if (hasMember!(T, "fprint")) v.fprint(OUT);
      else OUT.write(v);
    }
    void putRange(alias conf, T)(T v)
    {
      mixin("const PutConf c = "~conf~";");
      auto w = v;
      while (!w.empty) {
        putOne!conf(w.front); w.popFront();
        if (!w.empty) OUT.write(c.delimiter);
      }
    }
  }
}
 
 
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