Open an aircraft carrier to fight against Japan

Soon someone brought the blackboard over, and everyone in the audience saw that there was a lot of fun to watch, and they immediately became happy, and sat on the ground one after another, waiting for the good show to start. When everything was ready, Lin Yuan said to Xiao Dezhang: "Look Did you draw it yourself, or did you ask someone to draw it?"

Lu Fang whispered in Xiao Dezhang's ear, "Draw it yourself, sir, don't draw too many, just three."

Xiao Dezhang asked hesitantly, "Isn't the more the better?"

Lu Fang pointed to Lin Yuan's laptop and said, "That guy is very capable. Yesterday, Lin Yuan used it to count [-] sets. If we hadn't calculated it in advance and knew the result, we would have lost to Lin Yuan. ! So if you draw less today, we have a better chance of winning."

Xiao De Zhang frowned, and said angrily: "Since you are not fully sure, why did you agree to re-test?"

Embarrassed, Lu said, "Aren't I also trying to win face for your lord?"

When Xiaode Zhang heard this, he said angrily: "Absurd! Absurd! If he doesn't agree to Lin Yuan's competition, even if he doesn't kowtow to apologize, he can leave us with a reason to renege on his promise. Now it's good, if he loses, all previous efforts will be wasted!"

Lu Fang was so scolded that his face turned red and he didn't say a word. Xiao Dezhang took a deep breath and said, "Okay, now is not the time to talk about these things, you should try your best to beat Lin Yuan!"

Lu Fang obediently agreed, and Xiao Dezhang picked up a chalk and walked to the front of the blackboard. Just as he was about to draw, he heard Lin Yuan say, "Make it bigger, and it will be easier to use sand to measure later."

Xiao Dezhang looked at Lin Yuan, didn't speak, but drew three large scalenes on the blackboard, threw the chalk into Lu Fang's hand, and returned to his seat, Lu Fang said to Lin Yuan: "Lin Yuan My lord, can we begin?"

Lin Yuan chuckled and said, "This quadrilateral represents four different fields, but the field is too barren and needs something."

Lu Fang looked at Lin Yuan in surprise, and asked, "Something? What do you mean?"

Lin Yuan picked up the chalk from Lu Fang's palm, pinched it with his fingertips, and landed it in the center of the quadrilateral, then randomly drew a crooked line. Lu Fang hurriedly said, "You, what are you drawing?" I saw that Lin Yuan had already formed a strange arc in the middle of the quadrilateral with curved lines.

Lu Fang frowned and said, "What are you drawing?"

Lin Yuan smiled and said, "Unfortunately, there happens to be a pond in the middle of this field, and farmers usually carry water in it!"

Lu Fang said anxiously: "Nonsense, how can there be a pond in the field?"

Lin Yuan smiled and said, "You haven't seen all the fields, how can you know that there is no field with a pond? Even if there is no field, can't the farmers dig one themselves?"

Lu Fang was speechless for a while, and Lin Yuan then drew arcs on the two fields behind, and said, "Now there is a pond in the field, and when calculating the land area, the area of ​​the pond should be subtracted. Alright, let's measure it first." , I’ll measure again after measuring, and then we’ll start counting together, don’t play tricks!”

After Lin Yuan finished speaking, he turned around and sat on his desk. Lu Fang asked one of his subordinates to measure, and that subordinate approached the blackboard with a ruler and protractor, and whispered in Lu Fang's ear, "My lord, the crooked arc on the top How do you calculate the form?"

Lu Fang whispered: "Use the cutting method to calculate! Cut the arc into several small squares!"

The subordinate said: "But if you cut too little, the count will not be accurate, and if you cut too much, the count will be slow..."

Hearing what his subordinates said, Lu Fang immediately said: "It doesn't matter how much you cut, so what do you say? Stop talking nonsense, measure it quickly, and calculate it quickly after the measurement! We are not sure, and Lin Yuan may not be able to do it!"

His subordinates promised to finish the test, and Lu Fang said to Lin Yuan, "Now it's your turn to measure." Then Lu Fang saw Lin Yuan agreeing to walk to the front of the blackboard, but he didn't have a ruler in his hand. Lu Fang thought curiously: "Lin Yuan doesn't need a ruler. ? Then what did he use to measure it?"

Just when he was surprised, he saw Lin Yuan take out a square-shaped object from his pocket, aim it at the figure on the big blackboard, and then press the object, and heard a "click", the object turned out to be Send out a dazzling white light!Lu Fang couldn't help asking: "What is that thing in your hand?"

Lin Yuan turned off the photo shooting function of the communicator, and then said with a smile: "A ruler, a ruler that emits light, can measure at night. Alright, let's start."

Lu Fang hurriedly said: "Okay, let's start now!" As soon as Lu Fang's voice fell under his hands, he began to calculate nervously, Lin Yuan smiled in his heart: "You can calculate slowly, the three irregular arcs I drew See how you calculate? The area of ​​this irregular figure can only be calculated by integral, I don’t believe you can integrate! Even if you can integrate, those curves are curves with very complicated expressions, and you can’t calculate them at all.”

Thinking of this, Lin Yuan looked at his computer and thought: "I directly input the picture into the computer, and the optical recognition software inside will automatically extract the picture, and then establish a coordinate system on the curve to determine the value of each point, and then It will use mathematical methods to calculate a curve, use this curve to fit the original curve, and then calculate the integral value according to this curve, the accuracy is beyond your reach!"

While thinking about it, Lin Yuan uploaded the pictures on the communicator to the computer. He had already written the program. As long as the pictures were input, the computer would automatically process the data.Lin Yuan didn't delay this time, and entered the picture into the computer as quickly as possible, and then typed in the start command, and a progress bar popped up on the screen immediately, showing the completion status of the task.

While watching the progress bar fill up, Lin Yuan thought in his heart: "This calculation is not heavy, and it should be completed within 3 minutes." Thinking of this, he raised his head and looked at Lu Fang's men who were busy, I thought in my heart: "This time you have no chance of winning!"

Just as Lin Yuan was thinking, the computer made a "ding" sound, which was the notification sound for the end of the calculation. Lin Yuan looked at the three data that jumped out on the screen, and looked at Lu Fang's men who were busy, thinking in his heart: "I'm too fast, right? Should I wait for them for a while?" Thinking of this, Lin Yuan clicked on the minesweeper game casually, and waited until the last red flag was inserted, and the last blank was clicked, Lin Yuan smiled and said: "Okay, I count come out!"

Xiao Dezhang almost fell off the chair when he heard Lin Yuan's words, let alone the regret in his heart!Lu Fang hurriedly walked up to Xiao Dezhang and said, "My lord, there is no need to panic. There is a way to work slowly and carefully. Lin Yuan's calculations are so fast, he must not be accurate enough, and he will definitely lose!"

Xiao Dezhang had no choice but to trust Lu Fang, and at this moment he heard Lin Yuan ask, "Have you not finished the calculation yet?"

Lu Fang walked up to his subordinates and asked, "How many minutes will it take to finish the calculation?"

The subordinate said: "At least 10 minutes!"

Lu Fang said angrily, "Can't you hurry up?"

The subordinate said: "My lord, it can't be faster, we have only approximated the arc into three squares, if it is faster, it will be wrong!"

Lu Fang was very anxious, but at this moment he heard Lin Yuan say: "How about we take out the sand and see how big it is?"

Lu Fang said: "The wooden strip can't be deformed, we can't make out your arc!"

Lin Yuan smiled and said, "Don't worry, I've already thought of a solution!"