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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. string s;
  5. vector<vector<int>> DP;
  6.  
  7. int solve(int l, int r)
  8. {
  9.     if (l >= r) {
  10.         return 1;
  11.     }
  12.     if (DP[l][r] > -1) {
  13.         return DP[l][r];
  14.     }
  15.     DP[l][r] = r - l + 1;
  16.     for (int m = l; m < r; ++m) {
  17.         DP[l][r] = min(DP[l][r], solve(l, m) + solve(m + 1, r));
  18.     }
  19.     if (s[l] == s[r]) {
  20.         DP[l][r] = min(DP[l][r], solve(l + 1, r - 1));
  21.     }
  22.     return DP[l][r];
  23. }
  24.  
  25. int main()
  26. {
  27.     cin >> s;
  28.     DP.assign(s.size(), vector<int>(s.size(), -1));
  29.     cout << solve(0, s.size() - 1) << endl;
  30.     return 0;
  31. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/ZOKxQJ
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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