Submission #46985644

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Source Code Expand

#include <bits/stdc++.h>
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...)
#endif
using int64 = long long;
using uint = unsigned int;
using uint64 = unsigned long long;
bool ckmin(auto& a, auto b) { return b < a ? a = b, 1 : 0; }
bool ckmax(auto& a, auto b) { return b > a ? a = b, 1 : 0; }
using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  string s;
  int k;
  cin >> s >> k;
  int n = s.length();

  vector dp(n + 1, vector<int>(n));
  for (int i = 0; i < n; i++) {
    for (int j = i; j < n; j++) dp[i][j] = j - i + 1;
  }
  for (int len = 2; len <= n; len++) {
    for (int l = 0; l < n; l++) {
      int r = l + len - 1;
      if (r >= n) break;
      for (int t = l + 1; t <= r; t++) {
        ckmin(dp[l][r], dp[l][t - 1] + dp[t][r]);
      }
      if (s[l] == 'o') {
        for (int t = l + 1; t <= r; t++) {
          if (s[t] == 'f' && dp[l + 1][t - 1] == 0) {
            ckmin(dp[l][r], max(0, dp[t + 1][r] - k));
          }
        }
      }
    }
  }
  cout << dp[0][n - 1] << '\n';

  return 0;
}

Submission Info

Judge Result