44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
"""
|
|
贪婪法：在对问题求解时，总是做出在当前看来是最好的选择，
|
|
不追求最优解，快速找到满意解。
|
|
"""
|
|
class Thing(object):
|
|
"""物品"""
|
|
|
|
def __init__(self, name, price, weight):
|
|
self.name = name
|
|
self.price = price
|
|
self.weight = weight
|
|
|
|
@property
|
|
def value(self):
|
|
"""价格重量比"""
|
|
return self.price / self.weight
|
|
|
|
|
|
def input_thing():
|
|
"""输入物品信息"""
|
|
name_str, price_str, weight_str = input().split()
|
|
return name_str, int(price_str), int(weight_str)
|
|
|
|
|
|
def main():
|
|
"""主函数"""
|
|
max_weight, num_of_things = map(int, input().split())
|
|
all_things = []
|
|
for _ in range(num_of_things):
|
|
all_things.append(Thing(*input_thing()))
|
|
all_things.sort(key=lambda x: x.value, reverse=True)
|
|
total_weight = 0
|
|
total_price = 0
|
|
for thing in all_things:
|
|
if total_weight + thing.weight <= max_weight:
|
|
print(f'小偷拿走了{thing.name}')
|
|
total_weight += thing.weight
|
|
total_price += thing.price
|
|
print(f'总价值: {total_price}美元')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|