func_code_string: #include <bits/stdc++.h>   using namespace std;   int dp[255][105][105];   int c[255][255];   int cc[1005];   int N;   string s;   int f(char l, int i, int k) {     if (i == N) return 0;     if (dp[l][i][k] != -1) return dp[l][i][k];     int r = f(s[i], i + 1, k) + c[l][s[i]];     if (k) {       for (char x =  a ; x <=  z ; x++) r = max(r, f(x, i + 1, k - 1) + c[l][x]);     }     return dp[l][i][k] = r;   }   int main() {     int k, m;     char x, y;     int z;     cin >> s >> k >> m;     N = s.size();     for (int i = 0; i < m; i++) {       cin >> x >> y >> z;       c[x][y] = z;     }     memset(dp, -1, sizeof(dp));     cout << f( # , 0, k) << endl;     return 0;   }   