結果

問題 No.731 等差数列がだいすき
ユーザー dot_haraai
提出日時 2021-06-08 20:34:15
言語 Nim
(2.2.0)
結果
AC  
実行時間 2 ms / 1,500 ms
コード長 1,284 bytes
コンパイル時間 5,076 ms
コンパイル使用メモリ 86,528 KB
実行使用メモリ 5,248 KB
最終ジャッジ日時 2024-11-27 03:26:13
合計ジャッジ時間 5,663 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 18
権限があれば一括ダウンロードができます
コンパイルメッセージ
/home/judge/data/code/Main.nim(2, 18) Warning: Use the new 'sugar' module instead; future is deprecated [Deprecated]
/home/judge/data/code/Main.nim(1, 8) Warning: imported and not used: 'times' [UnusedImport]
/home/judge/data/code/Main.nim(2, 26) Warning: imported and not used: 'strformat' [UnusedImport]
/home/judge/data/code/Main.nim(2, 18) Warning: imported and not used: 'future' [UnusedImport]
/home/judge/data/code/Main.nim(2, 37) Warning: imported and not used: 'deques' [UnusedImport]
/home/judge/data/code/Main.nim(1, 41) Warning: imported and not used: 'algorithm' [UnusedImport]
/home/judge/data/code/Main.nim(1, 52) Warning: imported and not used: 'tables' [UnusedImport]
/home/judge/data/code/Main.nim(1, 60) Warning: imported and not used: 'sets' [UnusedImport]
/home/judge/data/code/Main.nim(1, 66) Warning: imported and not used: 'lists' [UnusedImport]
/home/judge/data/code/Main.nim(1, 73) Warning: imported and not used: 'intsets' [UnusedImport]
/home/judge/data/code/Main.nim(2, 8) Warning: imported and not used: 'critbits' [UnusedImport]

ソースコード

diff # 

import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')



proc solve()=
  var
    n = scan()
    a = newseqwith(n,scanf())
    ans = newseqwith(n,0.0)

  proc lsq():(float,float)=
    var
      sum_xk_yk:float = 0.0
      sum_xk:float = 0.0
      sum_yk:float = 0.0
      sum_xk_xk:float = 0.0
      resa:float
      resb:float
    for k  in 0..<n:
      sum_xk_yk += a[k]*((k).float)
      sum_xk += (k).float
      sum_yk += a[k]
      sum_xk_xk += ((k)^2).float
    resa = (n.float*sum_xk_yk-sum_xk*sum_yk) / (n.float*sum_xk_xk-sum_xk*sum_xk)
    resb = (sum_xk_xk*sum_yk-sum_xk_yk*sum_xk) / (n.float*sum_xk_xk-sum_xk*sum_xk)
    return (resa,resb)
  var
    (resa,resb) = lsq()
  for i in 0..<n:
    ans[i] = (resa*(i).float+resb-a[i])^2
  
  #echo resa
  echo resb, " ", resa
  echo ans.sum()



  
solve()
0