結果
問題 | No.464 PPAP |
ユーザー | 37zigen |
提出日時 | 2020-04-15 02:02:48 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 395 ms / 2,000 ms |
コード長 | 3,191 bytes |
コンパイル時間 | 2,285 ms |
コンパイル使用メモリ | 78,272 KB |
実行使用メモリ | 66,284 KB |
最終ジャッジ日時 | 2024-10-01 18:33:24 |
合計ジャッジ時間 | 6,643 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 55 ms
36,932 KB |
testcase_01 | AC | 56 ms
36,704 KB |
testcase_02 | AC | 55 ms
36,820 KB |
testcase_03 | AC | 54 ms
36,504 KB |
testcase_04 | AC | 54 ms
36,344 KB |
testcase_05 | AC | 54 ms
36,392 KB |
testcase_06 | AC | 54 ms
36,692 KB |
testcase_07 | AC | 112 ms
39,360 KB |
testcase_08 | AC | 87 ms
39,176 KB |
testcase_09 | AC | 80 ms
38,852 KB |
testcase_10 | AC | 395 ms
66,284 KB |
testcase_11 | AC | 208 ms
54,304 KB |
testcase_12 | AC | 305 ms
65,724 KB |
testcase_13 | AC | 213 ms
64,572 KB |
testcase_14 | AC | 305 ms
65,656 KB |
testcase_15 | AC | 54 ms
36,840 KB |
testcase_16 | AC | 54 ms
36,896 KB |
testcase_17 | AC | 55 ms
36,524 KB |
testcase_18 | AC | 56 ms
36,772 KB |
testcase_19 | AC | 53 ms
36,912 KB |
testcase_20 | AC | 55 ms
36,656 KB |
testcase_21 | AC | 54 ms
36,928 KB |
testcase_22 | AC | 52 ms
36,744 KB |
testcase_23 | AC | 218 ms
64,660 KB |
testcase_24 | AC | 214 ms
64,708 KB |
testcase_25 | AC | 216 ms
64,872 KB |
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; public class Main { final long MOD=(long)1e9+7; boolean[][] palindrome(char[] cs) { int n=cs.length; boolean[][] dp=new boolean[n][n]; for (int i=0;i<n;++i) { int p=0; while (0<=i-p&&i+p<n&&cs[i-p]==cs[i+p]) { dp[i-p][i+p]=true; ++p; } p=0; while (0<=i-p-1&&i+p<n&&cs[i-p-1]==cs[i+p]) { dp[i-p-1][i+p]=true; ++p; } } return dp; } void run() { FastScanner sc=new FastScanner(); PrintWriter pw=new PrintWriter(System.out); char[] cs=sc.next().toCharArray(); int n=cs.length; boolean[][] dp=palindrome(cs); long[] head=new long[n]; //P1=[0....i] //P2=[i+1...j] for (int i=0;i<n;++i) { if (!dp[0][i]) continue; for (int j=i+1;j<n;++j) { if (!dp[i+1][j]) continue; ++head[j]; } } long ans=0; for (int i=0;i<n;++i) { for (int j=i+2;j<n;++j) { if (!dp[j][n-1]) continue; ans+=head[i]; } } pw.println(ans); pw.close(); } void tr(Object...objects) {System.out.println(Arrays.deepToString(objects));} public static void main(String[] args) { new Main().run(); } } 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;} 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(); } }