View Compilation Error

0_0_25846473_13993.cpp: In function 'long long int dfs(int, int, int)':
0_0_25846473_13993.cpp:29:5: error: expected ',' or ';' before 'for'
     for(int i=0;i<=up_bound;i++)
     ^
0_0_25846473_13993.cpp:29:17: error: 'i' was not declared in this scope
     for(int i=0;i<=up_bound;i++)
                 ^