func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 5;   const int M = 1e5 + 5;   long long mod_exp(long long cur, long long power) {     long long res = 1;     while (power > 0) {       if (power % 2 == 0) {         cur = (cur * cur) % 1000000007;       } else {         res = (res * cur) % 1000000007;         cur = (cur * cur) % 1000000007;       }       power /= 2;     }     return res;   }   int main() {     ios_base::sync_with_stdio(false);     int i, j, n, m;     cin >> n >> m;     long long dp1[N], dp0[N];     dp1[0] = dp0[0] = 1;     dp1[1] = dp0[1] = 2;     for (i = 2; i < N; i++) {       dp1[i] = (dp0[i - 1] + dp0[i - 2]) % 1000000007;       dp0[i] = (dp1[i - 1] + dp1[i - 2]) % 1000000007;     }     long long foo = (dp1[m - 1] + dp0[m - 1]) % 1000000007;     foo = (foo - 2 + 1000000007) % 1000000007;     foo = (foo + dp0[n - 1] + dp1[n - 1]) % 1000000007;     cout << foo << endl;     return 0;   }   