View Compilation Error

0_0_35412262_5363.cpp: In function 'int main()':
0_0_35412262_5363.cpp:57:22: error: 'n' was not declared in this scope
     if(q_pow((ll)2,i,n)==1) {printf("2^%lld mod %lld = 1\n",i,n);break;}
                      ^