View Compilation Error

0_0_37622401_24957.cpp: In function 'int main()':
0_0_37622401_24957.cpp:45:40: error: lvalue required as left operand of assignment
   for(RI i=0;i<len;i++) a[i].x=a[i].y=0=b[i].x=b[i].y=0;
                                        ^
0_0_37622401_24957.cpp:56:27: error: redeclaration of 'long long int ans'
   int tot=N*(N-1)*(N-2)/6,ans=tot;
                           ^
0_0_37622401_24957.cpp:54:7: note: 'long long int ans' previously declared here
   int ans=0;
       ^