func_code_string: #include <bits/stdc++.h>   using namespace std;   long long fib[100005], mod = 1e9 + 7;   void pre() {     fib[0] = fib[1] = 1;     for (int i = 2; i < 100005; i++) fib[i] = (fib[i - 1] + fib[i - 2]) % mod;   }   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     pre();     long long m, n, x;     cin >> m >> n;     x = (fib[m] + fib[n] - 1) % mod;     cout << (2LL * x) % mod;     return 0;   }   