func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD = 1e9 + 7;   const int MAX_N = 1e5 + 50;   int w[MAX_N];   void solve() {     int n, m;     cin >> n >> m;     long long ret = ((long long)w[n] + (long long)w[m] - 1LL) * 2LL;     cout << ret % MOD <<   n ;   }   void precal() {     w[0] = 0;     w[1] = 1;     w[2] = 2;     for (int i = (3); i < (MAX_N); ++i) {       w[i] = w[i - 1] + w[i - 2];       w[i] %= MOD;     }   }   signed main(void) {     ios_base::sync_with_stdio(false);     cin.tie(0);     precal();     solve();     return 0;   }   