"This ......" Liu Shuqin hesitated a little, is there really no problem with this question? They only said that they knew or didn't know from beginning to end, and there were lies in the middle, could anyone really deduce this card?

For Liu Shuqin, she has no clue at all, or rather, since she was a child, she has never encountered such a strange topic. Pen "Fun" Pavilion www.biquge.info

I don't know why, Liu Shuqin subconsciously looked at Luo Yu, only to see Luo Yu dragging his chin with one hand, his eyebrows furrowed.

"Won't he either?" Liu Shuqin glanced at the pillar of incense, this incense burned faster than ordinary incense, and about 15 minutes of time can be used to think, which is 5 minutes longer than the previous level with such a large amount of calculation.

If Liu Shuqin chooses, she would rather encounter a topic like the second level than this kind of topic, and she can calculate the second level anyway, and she can only stand there as blankly as Lu Manqing in this level.

"I know!" When the three girls were at a loss, Luo Yu spoke up, and the speed was so fast that Liu Shuqin couldn't help but exclaim.

The three girls looked at Luo Yu, and saw that Luo Yu's eyes were full of confidence, and there was a shallow smile on the corner of her mouth.

"Are you sure you don't want to think about it again?" This time even the triangular-headed mecha man was surprised, it wasn't that he didn't think that someone could make it, but it took less than 1 minute from the question to the answer, if it weren't for Luo Yu's confident appearance, it really wanted to wonder if Luo Yu was blind.

"No need. ”

Luo Yu was about to report the answer, but was stopped by Liu Shuqin: "Don't think about it anymore, after all, this is about the safety of the lives of the four of us." ”

"Yes, you tell us first, and tell us your reasons, although I definitely don't understand, but my young lady is so smart, maybe you will find something that you have missed?" Lu Manqing also leaned over and said.

Mu Tong was slightly dissatisfied with Lu Manqing's performance of treating Luo Yu as a buddy more and more, and his small body leaned slightly, blocking between Lu Manqing and Luo Yu, as if he was declaring his sovereignty.

It's a pity that she was not an adult, and her nutrition couldn't keep up when she was a child, and she wasn't very tall, so the three of them were like a family of three, Mu Tong didn't like to talk, but she wasn't stupid, she soon found out about this, her small mouth pouted slightly, and she stood aside with an unhappy face.

"What these two young ladies said makes sense, you still tell them your analysis, thinking too fast will inevitably lead to some omissions, one more person also has more wisdom, you can rest assured, even if you are wrong in the process of reasoning with them, I will not take it as your final answer, so you can rest assured to boldly analyze it to them." The triangular mecha man also reminded him out of kindness.

Luo Yu pondered for a moment and nodded: "It's because I'm so anxious that I forgot that this answer is related to the lives of the four of us." ”

Speaking of this, Luo Yu's back was also in a cold sweat, fortunately he was pulled by Liu Shuqin in time, otherwise if the reasoning was really wrong, something would happen.

"Time is running out, so Mr. Luo, please tell me your answer. Liu Shuqin looked at Luo Yu's eyes.

Luo Yu nodded: "My answer is the blue gun." ”

"How? The three of them don't seem to tell you any useful information from beginning to end, do they? And one of them is telling a lie. Liu Shuqin asked puzzled.

"Heh~" Luo Yu chuckled: "Actually, if this question really wants to embarrass us, I really can't necessarily deduce who is telling the truth and who is telling a lie, but these 18 cards are obviously carefully prepared for this question, as long as you use the hypothetical method, you can launch who is telling the truth and who is telling the truth." Speaking of this, Luo Yu also glanced at the mecha man with a triangular head, and the triangular head nodded, seemingly satisfied with what Luo Yu said.

"Hypothetical method?" is another method that Liu Shuqin didn't understand.

"Yes, let's assume that the square-headed mecha man is telling the truth, and the round-headed mecha man is telling a lie, you know, the square head only knows the pattern of the card, if you want to know the exact card, the color of the card with that pattern must be unique, so that there are green halberds, spears, hooks, crossbows, fans, axes, red bows, sticks, forks 9 possibilities, obviously 9 possibilities The square head cannot know the exact card, so it must be the square head telling the truth, and the round head telling the truth. Luo Yu borrowed the stone box from the triangle head, took out each card, and while analyzing, he picked out all the 9 cards he said.

The three women carefully compared, and sure enough, these 9 patterns are unique.

Lu Manqing's mouth opened wide: "It's amazing, it's so simple to analyze who is telling lies, why didn't I find out that you were so smart before I said it? Why don't you chase after my eldest lady? You see that my eldest lady is beautiful, and she reads poetry and books, and the most important thing is that her family background is good, and she is much richer than my family, how about it? I will tell you a matchmaker in the middle to ensure that you get twice the result with half the effort." Lu Manqing digressed by boasting, for fear that her eldest lady would not be able to get married.

"Manqing!" Liu Shuqin glared at Lu Manqing angrily, then turned his head and looked at Luo Yu apologetically: "Childe, please don't take it seriously, continue to analyze." ”

"How can there be?" Lu Manqing's expression was a little aggrieved, and he muttered quietly on the side: "Obviously, my breasts have been touched by others." ”

"Lu!Man!Qing!" Liu Shuqin burst out in an instant, how could she still be like a lady, the murderous aura exuded from her body made Luo Yu feel excited, Lu Manqing saw Liu Shuqin like this, the whole person was scared, and hurriedly ran to Luo Yu's back, secretly stretched out his head and looked at Liu Shuqin carefully.

"My family Qingqing usually likes to talk nonsense, and my son doesn't have to take it to heart. ”

Looking at the blackened Liu Shuqin, Luo Yu was frightened, and nodded like a chicken pecking rice: "Ahem, let's get down to business first, let's get down to business first." ”

Luo Yu smiled with a smile on his face, now Liu Shuqin's appearance is so terrifying, he is so frightened that he doesn't dare to gasp.

Now that I know that Fang Tou is telling a lie, the first sentence of Fang Tou is that it doesn't know which one it is, it knows the pattern of that card, which means that this pattern has appeared many times, and the cards that appear many times in it are yellow swords, knives, shields, green shields, blue swords, guns, and red knives, guns, and shields. ”

As he spoke, Luo Yu took the 9 cards out of the stone box and showed them to the third girl.

"The round head says, 'I don't know which one,' means that the patterns in the color it knows are the same as those in the cards of other colors, and then it says, ' And I know you don't actually know which one', this is the key to solving the problem, here it shows that if the pattern in a certain color card only appears once, then the color of the card can be excluded, looking back at the previous 18 cards, green and red cards can be thrown, combined with the conclusion of the first sentence we just analyzed the square head, there are only 5 cards left with yellow swords, knives, shields and blue swords and guns. Luo Yu analyzed confidently, and 4 more cards were put back into the stone box by Luo Yu.

Lu Manqing felt his brain explode, "Wait, what's going on?" I didn't understand, how could there be only 5 cards left in a few words?"

"I understand this, so let me explain it to you. Luo Yu just wanted to answer, but Liu Shuqin spoke up: "Qingqing, you can think about it the other way, if the pattern that Fang Tou knows does not appear in other cards, then Fang Tou will immediately know which card it is? In the last sentence, Liu Shuqin said it to Tou Luo Yu, obviously asking Luo Yu's opinion and analyzing it himself.

Luo Yu thought for a moment and nodded: "Miss Liu is really smart and clever, if it weren't for your reminder, I really wouldn't have noticed that Fang Tou's first sentence became dispensable after analyzing who told the truth and who told the lie." ”

Fang Tou said again that it didn't know, and translating it into the truth means that Fang Tou knew, indicating that the pattern it saw was the only one in the yellow card and the blue card, so there were three possibilities: yellow knife, shield, and blue gun. Luo Yu smiled and held the three cards in front of him.

Roundhead said that it knew it too, and as it said before, it knew the color of this card, which means that the color it knows is also the only one in the remaining three cards, so only the blue gun remains. As he spoke, the yellow knife and shield cards were also thrown into the box by Luo Yu.

PS: Idea of solving the problem (because the author's words have a word limit of 500 words, so put a little bit into the text):

After translating the false into the truth, the dialogue goes like this:

Square-Headed Mech: I don't know which card this is.

Round-headed Mech: I don't know which one, and I know you don't know which one.

Square-Headed Mech: I know which card this is.

Round-headed Mech: I know, too.

In the first sentence, the square head (knowing the pattern) does not know which one it is, which means that this pattern has appeared many times, and the ones that appear many times in it are:

Yellow (sword, knife, shield)

Green (shield)

Blue (sword, gun)

Red (knives, guns, shields)

Of course, this first sentence can actually be skipped and analyzed directly from the second sentence, if it carries the above known conditions analyzed from the first sentence, it will affect the analysis of the second sentence.

The function of adding the first sentence to Fang Tou is mainly to judge who is lying, and then tell Yuantou and Luo Yu that the pattern of this card has appeared more than once.