結果
問題 | No.1715 Dinner 2 |
ユーザー |
|
提出日時 | 2021-10-23 01:34:57 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 528 ms / 2,000 ms |
コード長 | 3,376 bytes |
コンパイル時間 | 2,678 ms |
コンパイル使用メモリ | 82,484 KB |
実行使用メモリ | 58,292 KB |
最終ジャッジ日時 | 2024-09-24 10:42:52 |
合計ジャッジ時間 | 11,600 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 38 |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.NoSuchElementException; class Main implements Runnable { public static void main(String[] args) { new Main().run(); } public void run() { FastScanner sc = new FastScanner(); PrintWriter pw=new PrintWriter(System.out); int N=sc.nextInt(); int D=sc.nextInt(); int[] P=new int[N]; int[] Q=new int[N]; for (int i=0;i<N;++i) { P[i]=sc.nextInt(); Q[i]=sc.nextInt(); } long ok=-(long)1e8; long ng=1; long INF=Long.MAX_VALUE/3; while (ng-ok>1) { long m=(ok+ng)/2; long[] dp=new long[N]; for (int d=0;d<D;++d) { long[] ndp=new long[N]; Arrays.fill(ndp, -INF); int imax=0; for (int i=0;i<N;++i) if (dp[imax]<dp[i]) imax=i; for (int i=0;i<N;++i) { if (i!=imax&&dp[imax]-P[i]>=m) { ndp[i]=dp[imax]-P[i]+Q[i]; } } for (int i=0;i<N;++i) { if (i!=imax&&dp[i]-P[imax]>=m) { ndp[imax]=Math.max(ndp[imax], dp[i]-P[imax]+Q[imax]); } } dp=ndp; } if (Arrays.stream(dp).max().getAsLong()>=m) { ok=m; } else { ng=m; } } pw.println(ok); pw.close(); } void tr(Object...objects) { System.out.println(Arrays.deepToString(objects)); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; }else{ ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;} private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;} public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();} public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while(isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while(true){ if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; }else if(b == -1 || !isPrintableChar(b)){ return minus ? -n : n; }else{ throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next());} }