結果
問題 | No.765 ukuku 2 |
ユーザー | pekempey |
提出日時 | 2018-12-13 12:20:50 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,604 bytes |
コンパイル時間 | 314 ms |
コンパイル使用メモリ | 34,560 KB |
実行使用メモリ | 14,976 KB |
最終ジャッジ日時 | 2024-09-25 04:24:06 |
合計ジャッジ時間 | 7,392 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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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 | 7 ms
8,960 KB |
testcase_01 | AC | 9 ms
8,960 KB |
testcase_02 | AC | 6 ms
8,960 KB |
testcase_03 | AC | 6 ms
8,832 KB |
testcase_04 | AC | 7 ms
8,960 KB |
testcase_05 | AC | 7 ms
8,832 KB |
testcase_06 | AC | 8 ms
8,832 KB |
testcase_07 | AC | 8 ms
8,960 KB |
testcase_08 | AC | 7 ms
8,832 KB |
testcase_09 | AC | 9 ms
8,960 KB |
testcase_10 | AC | 7 ms
8,832 KB |
testcase_11 | AC | 8 ms
8,960 KB |
testcase_12 | AC | 9 ms
8,960 KB |
testcase_13 | AC | 9 ms
8,832 KB |
testcase_14 | AC | 9 ms
8,960 KB |
testcase_15 | AC | 9 ms
8,960 KB |
testcase_16 | AC | 11 ms
8,960 KB |
testcase_17 | AC | 11 ms
8,960 KB |
testcase_18 | AC | 11 ms
8,960 KB |
testcase_19 | AC | 12 ms
8,960 KB |
testcase_20 | AC | 10 ms
8,960 KB |
testcase_21 | AC | 10 ms
8,960 KB |
testcase_22 | AC | 11 ms
9,088 KB |
testcase_23 | AC | 11 ms
8,960 KB |
testcase_24 | AC | 11 ms
8,960 KB |
testcase_25 | AC | 9 ms
8,832 KB |
testcase_26 | AC | 12 ms
8,960 KB |
testcase_27 | AC | 12 ms
9,088 KB |
testcase_28 | AC | 12 ms
8,960 KB |
testcase_29 | AC | 11 ms
8,832 KB |
testcase_30 | WA | - |
testcase_31 | AC | 286 ms
13,824 KB |
testcase_32 | AC | 214 ms
12,928 KB |
testcase_33 | AC | 174 ms
14,952 KB |
testcase_34 | AC | 173 ms
14,864 KB |
testcase_35 | AC | 345 ms
14,928 KB |
testcase_36 | AC | 335 ms
14,976 KB |
testcase_37 | AC | 186 ms
14,848 KB |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | AC | 261 ms
13,952 KB |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | AC | 273 ms
14,080 KB |
testcase_44 | AC | 273 ms
14,080 KB |
testcase_45 | AC | 309 ms
14,720 KB |
testcase_46 | AC | 269 ms
13,824 KB |
testcase_47 | AC | 315 ms
14,720 KB |
testcase_48 | AC | 321 ms
14,592 KB |
testcase_49 | WA | - |
ソースコード
#include <stdio.h> #include <string.h> #define N 400001 #define M 262144 int n; char s[N+1]; int sa[N+1], ra[N+1], ha[N+1]; int sg[M*2]; int min(int x, int y) { return x < y ? x : y; } int max(int x, int y) { return x > y ? x : y; } void buildsa() { for (int i = 0; i <= n; i++) ra[i] = s[i]; for (int k = 1; k <= n; k *= 2) { static int rb[N + 1], sm[N + 3], tm[N + 1]; for (int i = 0; i <= n; i++) rb[i] = i + k <= n ? ra[i + k] + 1 : 0; memset(sm, 0, sizeof(sm)); for (int i = 0; i <= n; i++) sm[rb[i] + 1]++; for (int i = 0; i <= N; i++) sm[i + 1] += sm[i]; for (int i = 0; i <= n; i++) sa[sm[rb[i]]++] = i; memset(sm, 0, sizeof(sm)); memcpy(tm, sa, sizeof(tm)); for (int i = 0; i <= n; i++) sm[ra[i] + 1]++; for (int i = 0; i <= N; i++) sm[i + 1] += sm[i]; for (int i = 0; i <= n; i++) sa[sm[ra[tm[i]]]++] = tm[i]; tm[sa[0]] = 0; for (int i = 1; i <= n; i++) tm[sa[i]] = tm[sa[i - 1]] + (ra[sa[i - 1]] != ra[sa[i]] || rb[sa[i - 1]] != rb[sa[i]]); memcpy(ra, tm, sizeof(ra)); } } void buildha() { int k = 0; for (int i = 0; i <= n; i++) { if (ra[i] == n) continue; int j = sa[ra[i] + 1]; while (s[i + k] == s[j + k]) k++; ha[ra[i]] = k; if (k > 0) k--; } for (int i = 0; i <= n; i++) { sg[i + M] = ha[i]; } for (int i = M - 1; i > 0; i--) { sg[i] = min(sg[i * 2], sg[i * 2 + 1]); } } int lcp(int i, int j) { if (i == j) return n - i; i = ra[i]; j = ra[j]; int l = min(i, j) + M; int r = max(i, j) + M; int res = 2147483647; for (; l < r; l >>= 1, r >>= 1) { if (l & 1) res = min(res, sg[l++]); if (r & 1) res = min(res, sg[--r]); } return res; } int solve(int i, int j, int n1, int n2) { int h = lcp(i, j); if (h == n1 || h == n2) return h; i += h; j += h; return h + max(lcp(i + 1, j), lcp(i, j + 1)); } int main() { scanf("%s", s); int m = strlen(s); for (int i = 0; i < m; i++) { s[m + 1 + i] = s[m - 1 - i]; } s[m] = '$'; n = m * 2 + 1; s[n] = 0; buildsa(); buildha(); int ans = 0; /* even length */ for (int i = 0; i < m; i++) { int x = 2 * solve(i + 1, n - i, m - i - 1, i); x = min(x, m - 2); ans = max(ans, x + 1); } /* odd length */ for (int i = 1; i < m; i++) { int x = 2 * solve(i, n - i, m - i, i); x = min(x, m - 1); ans = max(ans, x); } printf("%d\n", ans); return 0; }