結果
問題 | No.626 Randomized 01 Knapsack |
ユーザー | 夕叢霧香(ゆうむらきりか) |
提出日時 | 2017-12-20 20:48:31 |
言語 | Java21 (openjdk 21) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,253 bytes |
コンパイル時間 | 2,802 ms |
コンパイル使用メモリ | 85,432 KB |
実行使用メモリ | 40,060 KB |
最終ジャッジ日時 | 2024-12-16 07:14:28 |
合計ジャッジ時間 | 5,311 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | RE | - |
testcase_01 | RE | - |
testcase_02 | RE | - |
testcase_03 | RE | - |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | RE | - |
testcase_15 | RE | - |
testcase_16 | RE | - |
testcase_17 | RE | - |
testcase_18 | RE | - |
testcase_19 | RE | - |
testcase_20 | RE | - |
testcase_21 | RE | - |
testcase_22 | RE | - |
testcase_23 | RE | - |
testcase_24 | RE | - |
ソースコード
import java.io.*; import java.util.*; final class P implements Comparable<P>{ double a; long b; P(double x,long y){a=x;b=y;} @Override public int compareTo(P o){ return Double.compare(a,o.a); } } final class Main { long ans=0; int p; long[]v,w,vAcc,wAcc; void dfs(long rem,int a,long sum){ ans=Math.max(ans,sum); if(a>=p) return; double expect=(double)(vAcc[p]-vAcc[a])*(double)w[a]/(double)v[a]; if(sum+expect<ans-10) return; if(wAcc[p]-wAcc[a]<=rem){ ans=Math.max(ans,vAcc[p]-vAcc[a]+sum); return; } if(rem>=w[a]) dfs(rem-w[a],a+1,sum+v[a]); dfs(rem,a+1,sum); } Main(long[]v,long[]w,long ww, P[]rat){ p=rat.length; this.v=new long[p]; this.w=new long[p]; for(int i=0;i<p;++i){ int ind=(int)rat[i].b; this.v[i]=v[ind]; this.w[i]=w[ind]; } this.vAcc=new long[p+1]; this.wAcc=new long[p+1]; for(int i=0;i<p;++i){ this.vAcc[i+1]=this.vAcc[i]+this.v[i]; this.wAcc[i+1]=this.wAcc[i]+this.w[i]; } dfs(ww,0,0); } public static void main(String[] args) { MyScanner sc = new MyScanner(); out = new PrintWriter(new BufferedOutputStream(System.out)); int n=sc.nextInt(); long ww=sc.nextLong(); int p=0; long[]v=new long[n],w=new long[n]; for(int i=0;i<n;++i){ v[p]=sc.nextInt(); w[p]=sc.nextInt(); if(w[i]>ww)continue; p++; } if (p==0){ out.println(0); out.close(); return; } P[]rat=new P[p]; for(int i=0;i<p;++i) rat[i]=new P((double)v[i]/(double)w[i],i); Arrays.sort(rat,Collections.reverseOrder()); Main main=new Main(v,w,ww,rat); out.println(main.ans); out.close(); } // http://codeforces.com/blog/entry/7018 //-----------PrintWriter for faster output--------------------------------- public static PrintWriter out; //-----------MyScanner class for faster input---------- public static class MyScanner { BufferedReader br; StringTokenizer st; public MyScanner() { br = new BufferedReader(new InputStreamReader(System.in)); } String next() { while (st == null || !st.hasMoreElements()) { try { st = new StringTokenizer(br.readLine()); } catch (IOException e) { e.printStackTrace(); } } return st.nextToken(); } int nextInt() { return Integer.parseInt(next()); } long nextLong() { return Long.parseLong(next()); } double nextDouble() { return Double.parseDouble(next()); } String nextLine(){ String str = ""; try { str = br.readLine(); } catch (IOException e) { e.printStackTrace(); } return str; } } }