View Compilation Error

0_0_21228650_29538.cpp: In function 'void tarjan(int)':
0_0_21228650_29538.cpp:81:4: error: 'node' was not declared in this scope
    node[sumgroup].push_back(stack[t]);
    ^
0_0_21228650_29538.cpp:81:35: error: 't' was not declared in this scope
    node[sumgroup].push_back(stack[t]);
                                   ^