View Compilation Error

0_0_31314706_22597.cpp: In function 'void DFS(int, int)':
0_0_31314706_22597.cpp:55:20: error: 'm' was not declared in this scope
    if(u != 1) mn = m
                    ^
0_0_31314706_22597.cpp:55:20: error: expected '}' at end of input
0_0_31314706_22597.cpp:55:20: error: expected '}' at end of input
0_0_31314706_22597.cpp:55:20: error: expected '}' at end of input