View Compilation Error

0_0_29420685_24876.cpp: In function 'int main()':
0_0_29420685_24876.cpp:69:55: error: 'zw' was not declared in this scope
   for(int i=0;i<l;i++) val[i]=(ll)(a[i].x/l+0.5),a[i]=zw{0,0};
                                                       ^