View Compilation Error

0_0_29057539_15212.cpp: In function 'void dfs(int)':
0_0_29057539_15212.cpp:37:4: error: 'd' was not declared in this scope
    d
    ^
0_0_29057539_15212.cpp:37:4: error: expected '}' at end of input
0_0_29057539_15212.cpp:37:4: error: expected '}' at end of input
0_0_29057539_15212.cpp:37:4: error: expected '}' at end of input