打卡帖 告别拖延症～

list.extend(another list)

Python 这么写 可以锁定当前层数的node

python

.append()     for old list

to create a new list
list + [new element]

https://www.lintcode.com/problem/combinations/

for each element, you either take it or not take it.

Also, use

newCombi = list(combination)
results.append(newCombi)

to create a new copy

https://www.programmersought.com/article/97845197855/

if result > (1 << 31) - 1 or result < - (1 << 31) :

https://www.guru99.com/learn-pyt ... nderstand-main.html

In python3, you do not actually need to do the if __name__ == "__main__": thingy

UCLA34 发表于 2021-8-30 18:58
https://www.guru99.com/learn-python-main-function-with-examples-understand-main.html

In python3,  ...

def main():
  print("Hello World!")
  
main()
print("Guru99")

distance = [[float('inf')]*n for _ in range(m)] , this will create seperate rows, if do *n *m, it will create same row, change one row will affect all the other rows

        distance = [[float('inf')]*m for _ in range(n)]     m for col and n for row