def check(colours):c=[]for i in colours:c.append(i)for i in range (1,len(c)+1):for j in range (i,len(c)+1):x = i + jif x < len(c)+1:if c[x-1] == c[i-1] and c[x-1] == c[j-1]:return Falsereturn Truearr=["R","G","B"]sol=[]for i in range(1,15):for j in range(len(arr)**i):ret=""new=jfor _ in range(i):ret+=arr[new%len(arr)]new/=len(arr)new=int(new)if check(ret):print("n="+str(i))print(ret)break
