func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a[100005], i, j, m, n, ans = 0, pos = 1;     cin >> n;     for (i = 1; i <= n; i++) cin >> a[i];     for (i = 3; i <= n;) {       if (a[i] == a[i - 1] + a[i - 2]) {         while (a[i] == a[i - 1] + a[i - 2] && i <= n) {           i++;         }         ans = max(i - pos, ans);         pos = i - 2;       } else         i++, pos = i - 2;     }     cout << max(ans, min(n, 2));     return 0;   }   