結果
| 問題 |
No.4 おもりと天秤
|
| コンテスト | |
| ユーザー |
keib
|
| 提出日時 | 2019-03-06 10:33:21 |
| 言語 | Swift (6.0.3) |
| 結果 |
AC
|
| 実行時間 | 11 ms / 5,000 ms |
| コード長 | 1,021 bytes |
| コンパイル時間 | 1,798 ms |
| コンパイル使用メモリ | 185,588 KB |
| 実行使用メモリ | 15,616 KB |
| 最終ジャッジ日時 | 2024-11-30 13:42:06 |
| 合計ジャッジ時間 | 2,830 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | AC * 23 |
ソースコード
import Foundation
let n = Int(readLine()!)!
let weights = readLine()!.split(separator:" ").map { Int($0)! }
var weightSum = 0
var maxWeight = 0
weights.forEach { weight in
weightSum += weight
maxWeight = Swift.max(weight, maxWeight)
}
if weightSum % 2 != 0 {
print("impossible")
exit(0)
}
let goal = weightSum / 2
if maxWeight > goal {
print("impossible")
exit(0)
}
var possibilities = Array<Int>(repeating: -1, count: goal + 1)
weights.enumerated().forEach { i, weight in
if possibilities[weight] < 0 {
possibilities[weight] = i
}
for j in 1 ..< Swift.min(goal - weight + 1, possibilities.count) {
if possibilities[j] < 0 {
continue
}
if possibilities[j] >= i {
continue
}
if possibilities[j + weight] >= 0 {
continue
}
if j + weight == goal {
print("possible")
exit(0)
}
possibilities[j + weight] = i
}
}
print("impossible")
exit(0)
keib