結果
問題 | No.1115 二つの数列 / Two Sequences |
ユーザー | 37zigen |
提出日時 | 2020-07-17 23:04:31 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 185 ms / 2,000 ms |
コード長 | 3,305 bytes |
コンパイル時間 | 2,399 ms |
コンパイル使用メモリ | 77,964 KB |
実行使用メモリ | 42,140 KB |
最終ジャッジ日時 | 2024-05-07 10:37:54 |
合計ジャッジ時間 | 7,577 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | AC | 80 ms
37,400 KB |
testcase_01 | AC | 44 ms
36,648 KB |
testcase_02 | AC | 45 ms
36,628 KB |
testcase_03 | AC | 166 ms
42,140 KB |
testcase_04 | AC | 164 ms
41,420 KB |
testcase_05 | AC | 175 ms
41,736 KB |
testcase_06 | AC | 169 ms
41,188 KB |
testcase_07 | AC | 182 ms
41,972 KB |
testcase_08 | AC | 75 ms
37,228 KB |
testcase_09 | AC | 159 ms
39,672 KB |
testcase_10 | AC | 171 ms
42,136 KB |
testcase_11 | AC | 45 ms
36,376 KB |
testcase_12 | AC | 181 ms
41,772 KB |
testcase_13 | AC | 165 ms
41,428 KB |
testcase_14 | AC | 185 ms
41,332 KB |
testcase_15 | AC | 43 ms
36,600 KB |
testcase_16 | AC | 44 ms
36,496 KB |
testcase_17 | AC | 46 ms
36,708 KB |
testcase_18 | AC | 46 ms
36,512 KB |
testcase_19 | AC | 49 ms
36,652 KB |
testcase_20 | AC | 44 ms
36,464 KB |
testcase_21 | AC | 44 ms
36,248 KB |
testcase_22 | AC | 44 ms
36,684 KB |
testcase_23 | AC | 81 ms
38,544 KB |
testcase_24 | AC | 118 ms
39,448 KB |
testcase_25 | AC | 159 ms
41,120 KB |
testcase_26 | AC | 101 ms
38,872 KB |
testcase_27 | AC | 134 ms
39,312 KB |
testcase_28 | AC | 132 ms
39,824 KB |
testcase_29 | AC | 157 ms
41,212 KB |
testcase_30 | AC | 173 ms
42,004 KB |
testcase_31 | AC | 104 ms
38,784 KB |
testcase_32 | AC | 97 ms
38,672 KB |
testcase_33 | AC | 174 ms
41,568 KB |
testcase_34 | AC | 45 ms
36,644 KB |
testcase_35 | AC | 43 ms
36,424 KB |
testcase_36 | AC | 44 ms
36,248 KB |
testcase_37 | AC | 45 ms
36,760 KB |
testcase_38 | AC | 45 ms
36,504 KB |
testcase_39 | AC | 45 ms
36,600 KB |
ソースコード
import java.io.IOException; import java.io.InputStream; import java.util.Arrays; import java.util.NoSuchElementException; public class Main { public static void main(String[] args) { new Main().run(); } class SegTree { int n=1; int[] v; public SegTree(int n_) { while (n<n_) n*=2; v=new int[2*n-1]; } void add(int k,int val) { k+=n-1; v[k]+=val; while (k>0) { k=(k-1)/2; v[k]=v[2*k+1]+v[2*k+2]; } } int query(int a,int b) { return query(0,n,a,b,0); } int query(int l,int r,int a,int b,int k) { if (a<=l&&r<=b) return v[k]; else if (r<=a||b<=l) return 0; else { int vl=query(l,(l+r)/2,a,b,2*k+1); int vr=query((l+r)/2,r,a,b,2*k+2); return vl+vr; } } } void run() { FastScanner sc=new FastScanner(); int N=sc.nextInt(); int[] A=new int[N]; int[] B=new int[N]; int[] C=new int[N]; for (int i=0;i<N;++i) { A[i]=sc.nextInt()-1; } for (int i=0;i<N;++i) { B[i]=sc.nextInt()-1; C[B[i]]=i; } for (int i=0;i<N;++i) { A[i]=C[A[i]]; } long ans=0; SegTree seg=new SegTree(N); for (int i=0;i<N;++i) { ans+=seg.query(A[i], N+1); seg.add(A[i], 1); } System.out.println(ans); } 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(); } } }