func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxint = -1u >> 1;   template <class T>   bool get_max(T& a, const T& b) {     return b > a ? a = b, 1 : 0;   }   template <class T>   bool get_min(T& a, const T& b) {     return b < a ? a = b, 1 : 0;   }   int main() {     int f[21];     int a, b, c;     cin >> a >> b >> c;     f[0] = a;     f[1] = b;     for (int i = 2; i < 21; i++) f[i] = f[i - 1] + f[i - 2];     cout << f[c] << endl;     return 0;   }   