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Science fiction network October 27 news (Liu Yazhu) ancient people cloud, Han Xin point soldiers - the more the merrier. Do you know how Han Xin ordered soldiers?
As an outstanding military figure in ancient China, Han Xin's story has been widely circulated, and Han Xin is one of them.
According to the "Records of History" and the "Book of Han", Liu Bang, the ancestor of Han Gao, often discussed with Han Xin the strategy of leading troops to fight, and once Liu Bang asked Han Xin how many soldiers he could bring, Han Xin arrogantly replied, "The more the more the better," and later people summarized this allusion as "Han Xin points out soldiers, the more the merrier." ”
In the last years of the Qin Dynasty, Chu and Han fought each other. Once, Han Xin engaged 1,500 soldiers against Li Feng, the general of the Chu Dynasty. After a bitter battle, the Chu army was defeated and returned to the camp, so Han Xin reorganized his troops and horses and returned to the base camp when the Chu army chased after them. Han Xin found that the enemy was less than five hundred horses, so he quickly ordered his troops to meet the enemy.
He ordered the soldiers to line up in a line of 3 people, and 2 more; then ordered the soldiers to be in a row of 5 people, resulting in 3 more; he ordered the soldiers to line up with 7 people, resulting in 2 more. Han Xin immediately announced to the generals that our army had 1,073 warriors, and the enemy was less than five hundred, and the enemy would certainly be defeated. Sure enough, not long after the battle, the Chu army was defeated and fled.
According to records, Han Xin taught the "Sun Tzu Arithmetic Classic" from Huangshi at an early age, and there is this algorithm in the arithmetic book: "Now there are things that do not know their number, the remaining two of the three or three numbers, the remaining three of the five and five numbers, the remaining two of the seven and seven numbers, ask the geometry of the things?" "In modern language, a number is divided by 3 more than 2, divided by 5 more than 3, divided by 7 more than 2, and this number is found.
In the Ming Dynasty, the famous mathematician Cheng Dawei summed up this saying in a poem: "Three people walk together seventy rarely, five trees plum blossom one branch, seven sons reunite in the first half of the month, except for one hundred and five." ”
Sun Tzu's Algorithm found that the solution to this problem was discovered earlier in China than in the West, so some people called it "Han Xin Dianbing", also known as "China's surplus theorem.". ”