View Compilation Error

0_0_36318731_20913.cpp: In function 'int main()':
0_0_36318731_20913.cpp:23:6: error: redeclaration of 'LL res'
   LL res=-0x3f3f3f3f;
      ^
0_0_36318731_20913.cpp:22:6: note: 'LL res' previously declared here
   LL res=0;
      ^
0_0_36318731_20913.cpp:38:15: error: 'maxn' was not declared in this scope
    if(i==n-1) maxn=a[i]*b[i];
               ^
0_0_36318731_20913.cpp:39:4: error: 'maxn' was not declared in this scope
    maxn=max(mxA[i]*mxB[i],mxA[i]*mnB[i]);
    ^