View Compilation Error

0_0_22158607_5707.cpp: In function 'void init(int)':
0_0_22158607_5707.cpp:76:42: error: 'deg' was not declared in this scope
         vis[i]=s[i]=col[i]=dfn[i]=low[i]=deg[i]=0;
                                          ^
0_0_22158607_5707.cpp:78:9: error: 'pre' was not declared in this scope
         pre[i]=i;
         ^