View Compilation Error

0_0_37693333_32498.cpp:8:21: error: expected ']' before ';' token
 long long b1[1000050;
                     ^
0_0_37693333_32498.cpp: In function 'int main()':
0_0_37693333_32498.cpp:23:25: error: 'b1' was not declared in this scope
   for(int i=1;i<=n;++i) b1[i]=b1[i-1]+p1[i];
                         ^
0_0_37693333_32498.cpp:29:7: error: 'b1' was not declared in this scope
    if(b1[x1]-b1[x-1]==x1-x+1) f=1;
       ^