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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define link sdkfsdkfls
  6. const int maxn = 1e5 + 42, sigma = 4, logn = 16;
  7.  
  8. int len[maxn], link[maxn], to[maxn][sigma];
  9. int minr[maxn], hlink[maxn];
  10. char s[maxn];
  11. int sz, n, last;
  12.  
  13. void init(int k)
  14. {
  15.     for(int i = 0; i <= k; i++)
  16.         memset(to[i], 0, sizeof(to[i]));
  17.     link[0] = -1;
  18.     last = n = 0;
  19.     sz = 1;
  20.     s[n++] = sigma;
  21. }
  22.  
  23. int get_link(int v)
  24. {
  25.     while(v != -1 && s[n - len[v] - 2] != s[n - 1]) v = link[v];
  26.     return v;
  27. }
  28.  
  29. void add_letter(char c)
  30. {
  31.     s[n++] = c;
  32.     last = get_link(last);
  33.     if(last == -1)
  34.     {
  35.         last = 0;
  36.         return;
  37.     }
  38.     if(!to[last][c])
  39.     {
  40.          len [sz] = len[last] + 2;
  41.          link[sz] = to[get_link( link[last])][c];
  42.         hlink[sz] = to[get_link(hlink[last])][c];
  43.         while(2 * len[hlink[sz]] > len[sz])
  44.             hlink[sz] = link[hlink[sz]];
  45.         minr[sz] = min(minr[last] + 1, len[sz] / 2 - len[hlink[sz]] + minr[hlink[sz]] + 1);
  46.         to[last][c] = sz++;
  47.     }
  48.     last = to[last][c];
  49. }
  50.  
  51.  
  52. main()
  53. {
  54.     ios::sync_with_stdio(0);
  55.     cin.tie(0);
  56.     int T;
  57.     cin >> T;
  58.     int tr[128];
  59.     tr['A'] = 0; tr['C'] = 1; tr['G'] = 2; tr['T'] = 3;
  60.     while(T--)
  61.     {
  62.         string S;
  63.         cin >> S;
  64.         int m = S.size();
  65.         init(m + 42);
  66.         int DP[m + 1];
  67.         memset(DP, 0, sizeof(DP));
  68.         for(int i = 1; i <= m; i++)
  69.         {
  70.             add_letter(tr[S[i - 1]]);
  71.             DP[i] = min(DP[i - 1] + 1, i - len[last] + minr[last] + 1);
  72.         }
  73.         cout << DP[m] << "\n";
  74.     }
  75.     return 0;
  76. }
  77.  
Runtime error #stdin #stdout 0.01s 6704KB
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https://ideone.com/9mZ8Aw
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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