func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   const int N = 1e5 + 5;   ll f[N];   int n, ans, c;   int main() {     scanf( %d , &n);     for (int i = 0; i < n; i++) scanf( %lld , &f[i]);     for (int i = 2; i < n; i++) {       if (f[i] == f[i - 1] + f[i - 2]) {         c++;         ans = max(ans, c + 2);       } else {         c = 0;       }     }     printf( %d n , (ans == 0 || ans == 1) ? (n == 1 ? 1 : 2) : ans);     return 0;   }   