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  1. //karanaggarwal
  2. #include<bits/stdc++.h>
  3. using namespace std;
  4.  
  5. #define TRACE
  6. #ifdef TRACE
  7. #define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
  8. template <typename Arg1>
  9. void __f(const char* name, Arg1&& arg1){
  10. cerr << name << " : " << arg1 << std::endl;
  11. }
  12. template <typename Arg1, typename... Args>
  13. void __f(const char* names, Arg1&& arg1, Args&&... args){
  14. const char* comma = strchr(names + 1, ',');cerr.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
  15. }
  16. #else
  17. #define trace(...)
  18. #endif
  19.  
  20. #define si(x) scanf("%d",&x)
  21. #define F first
  22. #define S second
  23. #define PB push_back
  24. #define MP make_pair
  25.  
  26. typedef long long LL;
  27. typedef pair<int,int> PII;
  28. typedef vector<int> VI;
  29. typedef vector<PII> VPII;
  30.  
  31. const int MAXN = 1000000;
  32.  
  33. void preProcess(string &s, string &ret)
  34. {
  35. int n = s.length();
  36. ret = "^";
  37. if (n == 0){ret+='$'; return;}
  38. for (int i = 0; i < n; i++)
  39. {
  40. ret += '#';
  41. ret += s[i];
  42. }
  43. ret += "#$";
  44. }
  45.  
  46. void longestPalindrome(string &s, VI &P)
  47. {
  48. string T;
  49. preProcess(s,T);
  50. int n = T.length();
  51. P.resize(n);
  52. int C = 0, R = 0;
  53. for (int i = 1; i < n-1; i++) {
  54. int i_mirror = 2*C-i; // equals to i' = C - (i-C)
  55.  
  56. P[i] = (R > i) ? min(R-i, P[i_mirror]) : 0;
  57. while (T[i + 1 + P[i]] == T[i - 1 - P[i]])
  58. P[i]++;
  59. if (i + P[i] > R) {
  60. C = i;
  61. R = i + P[i];
  62. }
  63. }
  64. for(int i =0; i < s.length(); i++)
  65. P[i] = (P[2 + 2*i]+1)/2;
  66. P.resize(s.length());
  67. }
  68.  
  69.  
  70.  
  71. struct node
  72. {
  73. int suff_link, len, next[26];
  74. int F[2];
  75. };
  76. int len;
  77. node tree[MAXN+5];
  78. int suff,num;
  79.  
  80. void init()
  81. {
  82. suff = num = 2;
  83. tree[1].len = -1; tree[1].suff_link = 1;
  84. tree[2].len = 0; tree[2].suff_link = 1;
  85. }
  86. void add_letter(int pos, string &s, int ty)
  87. {
  88. int cur = suff;
  89. int curlen = 0;
  90. while(1)
  91. {
  92. curlen = tree[cur].len;
  93. if(pos > curlen and s[pos - (1+curlen)]==s[pos]) break;
  94. cur = tree[cur].suff_link;
  95. }
  96. suff = tree[cur].next[s[pos]-'a'];
  97. if(suff)
  98. {
  99. if(tree[suff].F[ty]==0) tree[suff].F[ty] = pos;
  100. return;
  101. }
  102. suff = ++num;
  103. tree[suff].len = 2 + tree[cur].len;
  104. if(tree[suff].F[ty]==0) tree[suff].F[ty] = pos;
  105. tree[cur].next[s[pos]-'a'] = suff;
  106. if(tree[suff].len ==1)
  107. {
  108. tree[suff].suff_link = 2;
  109. return;
  110. }
  111. while(1)
  112. {
  113. cur = tree[cur].suff_link;
  114. curlen = tree[cur].len;
  115. if(pos > curlen and s[pos - (1+curlen)]==s[pos])
  116. {
  117. tree[suff].suff_link = tree[cur].next[s[pos]-'a'];
  118. return;
  119. }
  120. }
  121. }
  122.  
  123.  
  124. int main()
  125. {
  126. int t; si(t);
  127. while(t--)
  128. {
  129. VI A;
  130. string s; cin>>s; longestPalindrome(s,A);
  131. int n = s.length();
  132. vector<int> B(n+1,0);
  133. for(int i =0; i<=n+2; i++)
  134. {
  135. memset(tree[i].next, 0, sizeof(tree[i].next));
  136. tree[i].F[0] = tree[i].F[1] = 0;
  137. }
  138. init();
  139. for(int i =0; i<n; i++)
  140. add_letter(i,s,0);
  141. reverse(s.begin(),s.end());
  142. suff = 2;
  143. for(int i =0; i<n; i++)
  144. add_letter(i,s,1);
  145. for(int i =3; i<=num; i++)
  146. {
  147. tree[i].F[1] = n - 1 - tree[i].F[1];
  148. if(tree[i].F[0]>=tree[i].F[1])
  149. {
  150. B[tree[i].F[1]]++;
  151. B[tree[i].F[0] + 1]--;
  152. }
  153. }
  154. int total = num - 2;
  155. int mx = 0;
  156. for(int i =0; i<n; i++)
  157. {
  158. if(i) B[i] += B[i-1];
  159. mx = max(mx, total - B[i] + A[i]);
  160. }
  161. int cnt =0;
  162. for(int i =0; i<n;i++) if(mx==total-B[i] + A[i]) cnt++;
  163. printf("%d %d\n",mx,cnt);
  164. }
  165. return 0;
  166. }
Runtime error #stdin #stdout 0.01s 120640KB
stdin
Standard input is empty
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