if solveNQUtil(board, 0) == False:
print("Solution doesnt exists!")
def solveNQUtil(board, c):
if(solveNQUtil(board, c+1) == True):
print(board[i][j],end="")
for i,j in zip(range(r, -1, -1), range(c, -1, -1)):
for i,j in zip(range(r, n, -1), range(c, -1, -1)):
n = int(input("Enter any number: "))