View Compilation Error

0_0_26723537_11349.cpp: In function 'void powerval(int)':
0_0_26723537_11349.cpp:23:5: error: 'node' was not declared in this scope
     node[id].val2 = (node[id].val1 * node[id].val1) % mod;
     ^
0_0_26723537_11349.cpp:23:55: error: 'mod' was not declared in this scope
     node[id].val2 = (node[id].val1 * node[id].val1) % mod;
                                                       ^
0_0_26723537_11349.cpp: In function 'void PushDown(int, int)':
0_0_26723537_11349.cpp:92:14: error: 'rc' was not declared in this scope
     powerval(rc << 1 | 1);
              ^