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正文

数字*+

import sys
import math

# Auto-generated code below aims at helping you parse
# the standard input according to the problem statement.

n = int(input())
for i in range(n):
    a, b = [int(j) for j in input().split()]
    print(a*a+b)

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三角形

import sys
import math

# Auto-generated code below aims at helping you parse
# the standard input according to the problem statement.

a = int(input())
b = int(input())
c = int(input())

if (a + b > c) and (a + c > b) and (b + c > a) and a > 0 and b > 0 and c > 0:
    print(a + b + c)
else:
    print(-1)

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四舍五入

import sys
import math

# Auto-generated code below aims at helping you parse
# the standard input according to the problem statement.

n = int(input())
count = 0
for i in range(n):
    earning, probability = [float(j) for j in input().split()]
    count+=earning*probability
print(f"{round(count,2):.2f}")

写在最后

欢迎技术类的问题到这里提出，我会逐个解答

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