1001 A+B Format

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 −106≤a,b≤106. 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

代码长度限制

16 KB

时间限制

400 ms

内存限制

64 MB

栈限制

8192 KB

#include <iostream>
#include <string>
#include <sstream>
#include <iomanip>

using namespace std;

int main() {
    int a, b;
    cin >> a >> b;

    int sum = a + b;

    stringstream ss;
    ss << sum;
    string formatted_sum = ss.str();

    // Output the sum in standard format with commas
    int len = formatted_sum.length();
    for (int i = 0; i < len; ++i) {
        cout << formatted_sum[i];
        if ((len - i - 1) % 3 == 0 && i != len - 1 && formatted_sum[i] != '-') {
            cout << ",";
        }
    }
    cout << endl;

    return 0;
}