There are N clocks in the room. The clock is so weird that it has only four states: 3 o'clock, 6 o'clock, 9 o'clock, 12 o'clock, represented by 1,2,3,0.(i.e, state 1 means 3 o'clock, and so on). Now giving you the initial state of N clocks, and N operations you can use to make all the clocks into the state 12 o'clock. Each operation M[i](1<=i<=N) represents by a vector size of N, M[i][j] is 0 or 1. When you use operation M[i] on the N clocks, M[i][j] = 0 means the j-th clock will not make any change, M[i][j] = 1 means the j-th clock will turn into the next state (i.e, 3 o'clock --> 6 o'clock, 6 o'clock --> 9 o'clock, 9 o'clock -->12 o'clock, 12 o'clock -->3 o'clock). You should note that you can use each operation at most 3 times.