View Compilation Error

0_0_28597777_25381.cpp:8:12: error: size of array 'num' is negative
 ll num[M<<2],sum[M<<2],tmp[N<<1];int vis[N];
            ^
0_0_28597777_25381.cpp:8:22: error: size of array 'sum' is negative
 ll num[M<<2],sum[M<<2],tmp[N<<1];int vis[N];
                      ^