View Compilation Error

0_0_37816799_22319.cpp:61:18: error: 'i' was not declared in this scope
 int n,m,k,a[N],b[i],ans,x,y,q,cnt;
                  ^
0_0_37816799_22319.cpp: In function 'void Case_Test()':
0_0_37816799_22319.cpp:69:35: error: 'b' was not declared in this scope
     for (int i=1;i<=6;i++) a[i] = b[i] = 0;
                                   ^
0_0_37816799_22319.cpp:72:36: error: 'b' was not declared in this scope
     for (int i=1;i<=n;i++) cin>>x, b[x]++;
                                    ^
0_0_37816799_22319.cpp:74:21: error: 'b' was not declared in this scope
         if (a[i]>1||b[i]>1) ok = true;
                     ^