結果
問題 | No.599 回文かい |
ユーザー | uafr_cs |
提出日時 | 2017-11-24 23:12:18 |
言語 | Java21 (openjdk 21) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,176 bytes |
コンパイル時間 | 2,214 ms |
コンパイル使用メモリ | 77,740 KB |
実行使用メモリ | 114,208 KB |
最終ジャッジ日時 | 2024-11-27 08:01:53 |
合計ジャッジ時間 | 30,778 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 | AC | 114 ms
60,840 KB |
testcase_01 | AC | 117 ms
112,592 KB |
testcase_02 | AC | 118 ms
60,524 KB |
testcase_03 | AC | 113 ms
112,976 KB |
testcase_04 | WA | - |
testcase_05 | AC | 141 ms
112,744 KB |
testcase_06 | AC | 110 ms
60,024 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | AC | 174 ms
53,992 KB |
testcase_11 | AC | 177 ms
54,228 KB |
testcase_12 | AC | 267 ms
54,080 KB |
testcase_13 | AC | 369 ms
55,580 KB |
testcase_14 | TLE | - |
testcase_15 | TLE | - |
testcase_16 | TLE | - |
testcase_17 | TLE | - |
testcase_18 | AC | 107 ms
53,080 KB |
testcase_19 | AC | 119 ms
53,964 KB |
testcase_20 | AC | 119 ms
54,028 KB |
evil_0.txt | TLE | - |
ソースコード
import java.util.Arrays; import java.util.LinkedList; import java.util.Scanner; public class Main { public static long P1 = 1298719; public static long P2 = 961151; public static long MOD = 1000000007; public static long[] rolling_hash1(char[] ins){ long[] hash = new long[ins.length]; hash[0] = ins[0]; for(int i = 1; i < ins.length; i++){ hash[i] = hash[i - 1] * P1; hash[i] %= MOD; hash[i] += ins[i]; hash[i] %= MOD; } return hash; } public static long[] rolling_hash2(char[] ins){ long[] hash = new long[ins.length]; hash[0] = ins[0]; for(int i = 1; i < ins.length; i++){ hash[i] = hash[i - 1] * P2; hash[i] %= MOD; hash[i] += ins[i]; hash[i] %= MOD; } return hash; } public static long mod_pow(long a, long p){ if(p == 0){ return 1; } if(p == 1){ return a % MOD; } if(p % 2 == 1){ return (mod_pow(a, p - 1) * a) % MOD; }else{ final long ret = mod_pow(a, p / 2) % MOD; return (ret * ret) % MOD; } } public static long calc_hash1(long[] hash, int begin, int end){ final long from_end = hash[end - 1]; final long from_begin = (hash[begin] * mod_pow(P1, (end - begin) - 1)) % MOD; return (MOD + (from_end - from_begin)) % MOD; } public static long calc_hash2(long[] hash, int begin, int end){ final long from_end = hash[end - 1]; final long from_begin = (hash[begin] * mod_pow(P2, (end - begin) - 1)) % MOD; return (MOD + (from_end - from_begin)) % MOD; } public static long dfs(int offset, char[] ins, long[] memo, long[] hash1, long[] hash2){ if(memo[offset] >= 0){ return memo[offset]; } long ret = 1; LOOP: for(int len = 1; ;len++){ final int fst_begin = offset; final int snd_end = ins.length - offset; final int snd_begin = snd_end - len; final int fst_end = fst_begin + len; if(fst_end > snd_begin){ break; } /* System.out.println(fst_begin + " " + snd_begin + " " + len); System.out.println("[" + fst_begin + ", " + fst_end + "]"); //*/ /* for(int i = 0; i < len; i++){ final int fst = fst_begin + i; final int snd = snd_begin + i; if(ins[fst] != ins[snd]){ continue LOOP; } } //*/ if(len != 1){ final long fst_hash1 = calc_hash1(hash1, fst_begin, fst_end); final long snd_hash1 = calc_hash1(hash1, snd_begin, snd_end); final long fst_hash2 = calc_hash2(hash2, fst_begin, fst_end); final long snd_hash2 = calc_hash2(hash2, snd_begin, snd_end); //System.out.println(fst_hash + " " + snd_hash); if(fst_hash1 != snd_hash1){ continue; } if(fst_hash2 != snd_hash2){ continue; } }else if(ins[fst_begin] != ins[snd_begin]){ continue; } //System.out.println(offset + " " + fst_begin + " " + snd_begin + " " + len); ret += dfs(offset + len, ins, memo, hash1, hash2); ret %= MOD; } return memo[offset] = ret; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); final char[] ins = sc.next().toCharArray(); long[] memo = new long[ins.length]; Arrays.fill(memo, -1); System.out.println(dfs(0, ins, memo, rolling_hash1(ins), rolling_hash2(ins))); } }