func_code_string: #include <bits/stdc++.h>   using namespace std;   const int INF = 0x7fffffff;   int a[2010];   int gcd(int a, int b) { return (b == 0) ? a : gcd(b, a % b); }   int main() {     int n, count = 0;     scanf( %d , &n);     for (int i = 1; i <= n; ++i) {       scanf( %d , &a[i]);       if (a[i] == 1) ++count;     }     if (count) {       printf( %d , n - count);     } else {       int t = INF;       int i, j;       for (i = 1; i <= n; ++i) {         int x = a[i];         for (j = i + 1; j <= n; ++j) {           x = gcd(x, a[j]);           if (x == 1) {             t = min(t, j - i + 1);             break;           }         }       }       if (t == INF) {         puts( -1 );       } else {         printf( %d n , t - 1 + n - 1);       }     }     return 0;   }   