技術標籤：藍橋杯python

目錄

• • 問題描述
  • 思路分析及程式碼實現

問題描述

Calculate a+b and output the sum in standard format – that is, the digits must be separated into groups of three by commas (unless there are less than four digits).

Input Specification:
Each input file contains one test case. Each case contains a pair of integers a and b where −10^​6 ≤ a, b≤10^6. The numbers are separated by a space.

Output Specification:
For each test case, you should output the sum of a and b in one line. The sum must be written in the standard format.

Sample Input:
-1000000 9
Sample Output:
-999,991

思路分析及程式碼實現

這道題的答題意思就是給你兩個數，讓你先求出這兩個數之和，然後如果得到的結果每三個數一組，中間用逗號隔開，如果得到的結果是負數，則將負號放在第一組裡

def solve(a, b):
    sum = a +
 
 b
    sum = list(str(sum))
    num = 0
    if sum[0] == '-':
        print('-', end='')
        sum = sum[1:len(sum)]
        n = len(sum)
        for i in range(len(sum)):
            print(sum[i],end='')
            num += 1
            if num % 3 == 0 and i != n - 1:
                print(',', end=
 
'')
                num = 0
    else:
        n = len(sum)
        for i in range(len(sum)):
            print(sum[i],end='')
            num += 1
            if num % 3 == 0 and i != n - 1:
                print(',', end='')
                num = 0


solve(-1000000, 9)