結果
問題 | No.1117 数列分割 |
ユーザー |
|
提出日時 | 2020-07-24 15:42:25 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 686 ms / 3,000 ms |
コード長 | 3,656 bytes |
コンパイル時間 | 2,297 ms |
コンパイル使用メモリ | 78,572 KB |
実行使用メモリ | 159,520 KB |
最終ジャッジ日時 | 2024-06-25 06:37:01 |
合計ジャッジ時間 | 13,937 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 26 |
ソースコード
import java.io.IOException;import java.io.InputStream;import java.util.ArrayDeque;import java.util.Arrays;import java.util.Deque;import java.util.NoSuchElementException;class SlidingQueue {class Pair {long v,cnt;public Pair(long v,long cnt) {this.v=v;this.cnt=cnt;}}int sz=0;Deque<Pair> st=new ArrayDeque<>();final long INF=Long.MAX_VALUE/3;void push(long v) {int cnt=1;while (!st.isEmpty() && st.peekLast().v <= v) {cnt+=st.peekLast().cnt;st.pollLast();}st.addLast(new Pair(v,cnt));++sz;}void pop() {st.peekFirst().cnt--;if (st.peekFirst().cnt==0) st.pollFirst();--sz;}long max() {if (st.isEmpty()) {return -INF;} else {return st.peekFirst().v;}}}public class Main {public static void main(String[] args) {new Main().run();}void run() {FastScanner sc=new FastScanner();int N=sc.nextInt();int K=sc.nextInt();int M=sc.nextInt();long[] A=new long[N];long[] s=new long[N+1];for (int i=0;i<N;++i) {A[i]=sc.nextLong();}for (int i=1;i<=N;++i) {s[i]=A[i-1]+s[i-1];}long[][] dp=new long[3001][3001];Arrays.fill(dp[0], -Long.MAX_VALUE/3);dp[0][0]=0;for (int t=0;t<K;++t) {SlidingQueue sa=new SlidingQueue();SlidingQueue sb=new SlidingQueue();for (int i=0;i<N;++i) {sa.push(dp[t][i]-s[i]);sb.push(dp[t][i]+s[i]);if (sa.sz>M) sa.pop();if (sb.sz>M) sb.pop();dp[t+1][i+1]=Math.max(sa.max()+s[i+1],sb.max()-s[i+1]);}}System.out.println(dp[K][N]);}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 boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}private void skipUnprintable() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++;}public boolean hasNext() { skipUnprintable(); 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() {return (int)nextLong();}}}