View Compilation Error

0_0_36640482_22798.cpp: In member function 'void Segment_Tree::change1(int, int, int, int, int)':
0_0_36640482_22798.cpp:48:19: error: 'phi' was not declared in this scope
    addtag(now,l,r,phi[same[now]]);
                   ^
0_0_36640482_22798.cpp: In function 'int main()':
0_0_36640482_22798.cpp:86:5: error: 'phi' was not declared in this scope
     phi[1]=1;
     ^