Find all integral coordinates given top left corner and bottom right corner of a rectangle
 
Clash Royale CLAN TAG #URR8PPP   .everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty margin-bottom:0;     up vote  6  down vote  favorite     Here is the problem I am working on -  There is an $N times N$ field on which missiles are being bombarded. Initially,  all the cells in this field have the value $0$. There will be $M$ missiles  bombarded on this field. The $i$th missile will have power $P_i$ and it will  affect all the cells in region with $(A_i,B_i)$ as top-left corner and  $(C_i,D_i)$ as bottom-right corner. Because of missile, value of all the  cells in this rectangle will get XOR ed with $P_i$.   After all the missiles have been bombarded, you have to find out  values in each cell of this field. Here is what I have tried - N = 3 M = 3 missiles = [[3,3,1,3,2], [2,2,1,2,2], [3,1,1,2,3]] from itertools import product # Logic coords = for i in missiles:  Pi, Ai, Bi, Ci, Di = i  for j in product(*[range(Ai-1, Ci), range(Bi-1, Di)]):  if coords.get(j):  co...