func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, ans;   int main() {     int i, j, k;     scanf( %d , &n);     for (i = k = 0; i < n; i++) {       scanf( %d , &j);       if (j == 0 && k == 0)         continue;       else if (j == 0 && k == 2)         k = 1;       else if (j == 0 && k == 1)         k = 0;       else if (j == 1 && k == 1)         k = 2, ans += 2;       else if (j == 1)         ans++, k = 2;     }     printf( %d n , ans);     return 0;   }   