View Compilation Error

0_0_33835005_30851.cpp: In function 'int main()':
0_0_33835005_30851.cpp:34:5: error: 'root' was not declared in this scope
     root[i]=i,rank1[i]=1;
     ^
0_0_33835005_30851.cpp:34:15: error: 'rank1' was not declared in this scope
     root[i]=i,rank1[i]=1;
               ^