View Compilation Error

0_0_26794628_511.cpp: In function 'void dfs(int, int)':
0_0_26794628_511.cpp:36:17: error: 'e' was not declared in this scope
         int v = e[i].v;
                 ^
0_0_26794628_511.cpp:36:19: error: 'i' was not declared in this scope
         int v = e[i].v;
                   ^