結果

問題 No.1020 Reverse
コンテスト
ユーザー Maboy
提出日時 2021-06-28 23:29:48
言語 Swift
(6.2.4)
コンパイル:
swiftc _filename_ -Ounchecked -o a.out
実行:
./a.out
結果
TLE  
実行時間 -
コード長 418 bytes
記録
記録タグの例:
初AC ショートコード 純ショートコード 純主流ショートコード 最速実行時間
コンパイル時間 15,840 ms
コンパイル使用メモリ 232,632 KB
実行使用メモリ 26,532 KB
最終ジャッジ日時 2026-03-12 02:36:44
合計ジャッジ時間 112,370 ms
ジャッジサーバーID
（参考情報） 		judge3_1 / judge1_1
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 * 6 TLE * 9
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
Main.swift:6:9: warning: variable 's' was never mutated; consider changing to 'let' constant
 4 | let (N,K) = (n[0],n[1])
 5 | for i in 0..<N-K+1{
 6 |     var s = S.index(S.startIndex, offsetBy: i)
   |         `- warning: variable 's' was never mutated; consider changing to 'let' constant
 7 |     var e = S.index(S.startIndex, offsetBy: i+K-1)
 8 |     let T = i == 0 ? "" : S[...S.index(before: s)]

Main.swift:7:9: warning: variable 'e' was never mutated; consider changing to 'let' constant
 5 | for i in 0..<N-K+1{
 6 |     var s = S.index(S.startIndex, offsetBy: i)
 7 |     var e = S.index(S.startIndex, offsetBy: i+K-1)
   |         `- warning: variable 'e' was never mutated; consider changing to 'let' constant
 8 |     let T = i == 0 ? "" : S[...S.index(before: s)]
 9 |     var U = S[s...e]

Main.swift:9:9: warning: variable 'U' was never mutated; consider changing to 'let' constant
 7 |     var e = S.index(S.startIndex, offsetBy: i+K-1)
 8 |     let T = i == 0 ? "" : S[...S.index(before: s)]
 9 |     var U = S[s...e]
   |         `- warning: variable 'U' was never mutated; consider changing to 'let' constant
10 |     var V = e == S.endIndex ? "" : S[S.index(after: e)...]
11 |     S = T+String(U.reversed())+V

Main.swift:10:9: warning: variable 'V' was never mutated; consider changing to 'let' constant
 8 |     let T = i == 0 ? "" : S[...S.index(before: s)]
 9 |     var U = S[s...e]
10 |     var V = e == S.endIndex ? "" : S[S.index(after: e)...]
   |         `- warning: variable 'V' was never mutated; consider changing to 'let' constant
11 |     S = T+String(U.reversed())+V
12 | }

ソースコード

diff #
raw source code 

import Foundation
let n = readLine()!.split(separator: " ").map{Int($0)!}
var S = String(readLine()!)
let (N,K) = (n[0],n[1])
for i in 0..<N-K+1{
    var s = S.index(S.startIndex, offsetBy: i)
    var e = S.index(S.startIndex, offsetBy: i+K-1)
    let T = i == 0 ? "" : S[...S.index(before: s)]
    var U = S[s...e]
    var V = e == S.endIndex ? "" : S[S.index(after: e)...]
    S = T+String(U.reversed())+V
}
print(S)
0