View Compilation Error

0_0_33246215_13521.cpp: In function 'int main()':
0_0_33246215_13521.cpp:52:33: error: 'r' was not declared in this scope
    while(q[num].l==l&&q[num].r==r){
                                 ^
0_0_33246215_13521.cpp:53:23: error: expected ']' before ';' token
     q[num].ans = ans[r;
                       ^