Ou Ye returned to school, escorted by Lao Ou.

Lao Ou inspected Yan University for a few days, but there was no trace of Shen Qi, so he left.

Working in the body, Lao Ou can't stay by Ou Ye's side to care for a lifetime, he can only grasp the direction on the macro level.

Shen Qi is not afraid to face Lao Ou Gang, he has been busy applying for visas these days, and he has not met Lao Ou.

After Lao Ou left, Shen Qi saw Ou Ye: "You look good." ”

"You too. "It seems that Ouye has been recuperating for a few months at home.

"Let's go, let's go to class together. Shen Qi said.

"You've already got an offer from Princeton, and you still need to take classes?" Ou Ye had learned that Shen Qi was going abroad.

"Accompany you to class. Shen Qi took Ou Ye's little hand and led it in the direction of the teaching building: "From now until June, I will take whatever class you take." ”

"Hmm......" Ou Ye didn't expect to receive the benefit as soon as he returned to school, but the validity period of this benefit was only a few months.

This is a complicated feeling, the long-awaited love has come, but the male protagonist in love is about to go to a foreign country.

Ouye can't refuse, and if he refuses, even the expiration date of a few months will not exist.

The two holding hands look like a couple, and all they lack is a confession.

In the Science Building, the lecture "Cryptography" is being conducted.

Ou Ye took this course, and Shen Qi accompanied him.

"The Virginia Code is an upgraded version of the Caesar Code, and here is a student who wants to try it if I ask a student to come up on stage and write a set of Virginia Codes?" asked the cryptography professor.

"I'll do it. Shen Qi was the first to raise his hand.

He raised his hand, and there was no competition from the other students in the classroom.

Shen Qi walked up to the podium and wrote a set of Virginia cipher phalanx on the blackboard:

ACJSUYT...... BNL

BAPKJHYM...... SDC

......

The Virginia cipher square is characterized by the fact that each row consists of 26 letters, and each row is arranged in a different order.

The secret to deciphering the cipher phalanx is frequency analysis, which compares the cipher table and through calculations, it is possible to decipher the true information transmitted by the cipher writer.

Shen Qi wrote half of the English letters of the blackboard and completed his Virginia cipher phalanx.

When Shen Qi returned to the seat next to Ou Ye, Ou Ye deciphered Shen Qi's Virginia code against the password table.

The message that Shen Qi transmitted through the cipher phalanx was: "Ou Ye, is it okay to be my girlfriend, forever." ”

"Wow!"

The other students in the classroom deciphered this set of codes one after another, and Shen Qi used a set of codes to confess to Ou Ye!

The big guy is the big guy, and the way he confesses is different.

Happiness hit one after another in one day, and Ou Ye was a little dizzy.

Ou Ye waited for this moment for a long time, and when happiness became within reach, she couldn't believe it.

Shen Qi looked at Ou Ye's eyes sincerely, and expressed the meaning of the cipher phalanx again in words: "Ou Ye, be my girlfriend, are you willing?"

"Hmm!" Ou Ye nodded heavily, she was about to faint, and there were tears in her eyes.

"Together!"

"Together!"

The classroom was boiling, and the students applauded and congratulated the two with the best grades in the mathematics department on holding hands and coming together.

"So, mathematics is the most romantic subject. The professor of cryptography was reasonable, and did not prevent Shen Ou and the two from showing affection, but made a summary of the situation according to this unexpected event.

The professor added: "If you don't get good grades in math, you won't be able to catch up with girls, and I hope you will work hard to improve your math scores." This top student, who is about to go to Princeton's mathematics department for further study, has set an example for you. ”

The classroom was filled with joyful laughter, and the image of the cryptography professor in the minds of the students became taller.

Shen Qi looked up to the sky and laughed, this professor's teaching method is very good, he is really suitable for leading students.

Ou Ye lowered his head shyly and happily, and tapped Morse code on Shen Qi's thigh with his fingers: "I'm very happy." ”

Shen Qi also knocked Morse code on Ou Ye's thigh: "Your hand feels delicate, I hope to keep it." ”

Ou Ye covered his face, emmmm, it was so stressful to be his girlfriend.

After a brief period of commotion, cryptography classes continued.

The students studied this elective course carefully and were highly motivated to learn.

According to this trend, "Cryptography" may become a compulsory course in the School of Mathematics in the near future.

I hope that the more courses you can take while you can find a girlfriend, the better.

After officially confirming his relationship with Shen Qi, Ou Ye inspired an incomparably high spirit to study.

She can endure the lovesickness of Shen Qi not being by her side for a year, but two years or even longer, she can't stand it.

The situation in the United States is complicated, the social atmosphere is open, and there are all kinds of birds in the big forest.

"I said I'd be going to Princeton, too, definitely. Ou Ye said to Shen Qi.

"Then I'll be waiting for you in Princeton. Shen Qi stopped what he was doing and said.

This is a newly opened café with a quiet environment and a low number of customers due to high consumer prices.

Shen Qi and Ou Ye sat in the booth, Shen Qi was writing papers on his laptop, and Ou Ye was studying number theory diligently, and asked Shen Qi for advice from time to time.

Recently, Ouye has focused more than 80 percent of her study on number theory, and she has focused on this branch of mathematics.

Shen Qi passed the defense of his bachelor's degree in mathematics in the second semester of his freshman year and received his degree certificate from Yan University ahead of schedule.

Ou Ye also wants to take this shortcut, she is now a sophomore, and she has more than two years to go abroad after completing her four-year undergraduate study according to the regular route.

If you defend your dissertation in your junior year, you can save a year.

At this time, it is necessary to concentrate on a mathematical direction, and Ouye chose the direction of number theory, and her answer paper will be taken from this field.

"Don't work too hard, I'm afraid you'll be tired again. Thinking of last year's illness, Shen Qi had palpitations: "If you want to go home to recuperate for a few more months, it will be counterproductive." ”

"No, I'll take notice. Ou Ye closed the references of number theory and said, "You seem to owe me a gift." ”

"Switzerland is free, I will definitely deliver. Shen Qi patted his chest and promised.

"Well, with your words, I'm satisfied. Ou Ye didn't force it after reminding her, she knew that Shen Qi had been very busy in the past few months, and she was also very busy.

Shen Qi said that he must publish ten papers before going abroad, and he is now drafting the tenth.

Shen Qi's other wish is to get a second degree in physics from Yan University, and in the remaining months, Shen Qi must complete the remaining half of the credits.

In addition to accompanying his girlfriend, Shen Qi spent the rest of his time on his studies.

Fortunately, the girlfriend is also academic, and the two can fall in love while studying knowledge.

"As compensation, we went to Beidaihe this weekend for a free trip. Shen Qi suggested, "Combine work and rest, spend a short vacation, what do you think, Ouye?"

"Switzerland, Beidaihe, there are certain differences. Ou Ye, who didn't like to complain, couldn't help but complain.