func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, i, mx = 2, j;     cin >> n;     int a[n];     for (i = 0; i < n; i++) cin >> a[i];     if (n == 1)       cout <<  1 ;     else if (n == 2)       cout <<  2 ;     else {       for (i = 2; i < n;) {         int x = 0;         for (j = i; j < n; j++) {           if ((a[j] != (a[j - 1] + a[j - 2]))) break;           x++;         }         i = ++j;         mx = max(x + 2, mx);       }       cout << mx;     }     return 0;   }   