結果

問題 No.1102 Remnants
ユーザー dot_haraaidot_haraai
提出日時 2021-05-27 23:23:51
言語 Nim
(2.0.0)
結果
AC  
実行時間 122 ms / 2,000 ms
コード長 1,313 bytes
コンパイル時間 4,977 ms
コンパイル使用メモリ 73,492 KB
実行使用メモリ 11,920 KB
最終ジャッジ日時 2023-08-06 14:15:30
合計ジャッジ時間 8,546 ms
ジャッジサーバーID
(参考情報)
judge12 / judge13
このコードへのチャレンジ(β)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
4,376 KB
testcase_01 AC 2 ms
4,380 KB
testcase_02 AC 2 ms
4,376 KB
testcase_03 AC 2 ms
4,380 KB
testcase_04 AC 2 ms
4,380 KB
testcase_05 AC 87 ms
7,948 KB
testcase_06 AC 17 ms
4,380 KB
testcase_07 AC 122 ms
11,920 KB
testcase_08 AC 3 ms
4,376 KB
testcase_09 AC 6 ms
4,376 KB
testcase_10 AC 3 ms
4,384 KB
testcase_11 AC 5 ms
4,380 KB
testcase_12 AC 6 ms
4,376 KB
testcase_13 AC 6 ms
4,380 KB
testcase_14 AC 50 ms
5,976 KB
testcase_15 AC 39 ms
5,656 KB
testcase_16 AC 103 ms
9,444 KB
testcase_17 AC 97 ms
9,232 KB
testcase_18 AC 103 ms
9,668 KB
testcase_19 AC 36 ms
5,932 KB
testcase_20 AC 11 ms
4,376 KB
testcase_21 AC 62 ms
7,276 KB
testcase_22 AC 89 ms
9,252 KB
testcase_23 AC 68 ms
7,512 KB
testcase_24 AC 48 ms
6,208 KB
testcase_25 AC 106 ms
9,720 KB
testcase_26 AC 7 ms
4,380 KB
testcase_27 AC 27 ms
5,004 KB
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 xgcd(a,b:int):(int,int,int)=
  var
    b = b
    x0=1
    y0=0
    x1=0
    y1=1
    q:int
    a = a
  while b!=0:
    (q,a,b) = (a.div(b),b,a.mod(b))
    (x0,x1)=(x1,x0-q*x1)
    (y0,y1)=(y1,y0-q*y1)
  return (a,x0,y0)

# modの逆元
proc modinv(a,m:int):int=
  var (g,x,y)=xgcd(a,m)
  if g!=1:
    return -1
  else:
    return ((x mod m) + m).mod(m)



proc solve():int=
  var
    n = scan()
    k = scan()
    a = newseqwith(n,scan())
    md = 10^9+7
    comb = newseqwith(n+1,0)
  comb[0]=1 # combination(k,0)
  for idx in 1..n:
    var
      tk = k+idx
      tv = idx
    comb[idx] = ((comb[idx-1]*tk).mod(md)*modinv(tv,md)).mod(md)
  #echo comb
  for i in 0..<n:
    result+=((comb[i]*a[i]).mod(md)*(comb[n-i-1])).mod(md)
  result.mod=md
  
    
  
  

  

  
echo solve()
0