func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(nullptr);     int n;     cin >> n;     int a[n];     for (int i = 0; i < n; i++) cin >> a[i];     if (n == 1 || n == 2) {       cout << n <<   n ;       return 0;     }     int ans = 2, temp = 2;     for (int i = 2; i < n; i++) {       if (a[i] == a[i - 1] + a[i - 2]) {         temp++;         ans = max(ans, temp);       } else {         temp = 2;       }     }     cout << ans <<   n ;     return 0;   }   