1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#include <iostream>
#include <string>
#include <cstdlib>
#include <vector>
using namespace std;
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    string num1, num2;
    cin >> num1 >> num2;
    int fill = abs( int(num1.size() - num2.size()));
    int n = num1.size();
    if (num1.size() > num2.size())
    {
        n = num1.size();
        char a = '0';
        for (int i = 0; i < fill; i++)
        {
            num2 = a + num2;
        }
    }

    if (num1.size() < num2.size())
    {
        n = num2.size();
        char a = '0';
        for (int i = 0; i < fill; i++)
        {
            num1 = a + num1;
        }
    }
    vector <int> result;
    int rest = 0;
    int add = 0;
    result.resize(n + 1);
    for (int i = n; i > 0; i--)
    {
        int sum = num1[i - 1] - '0' + num2[i - 1] - '0' + rest;
        add = sum % 10;
        result[i] = add;
        rest = sum / 10;
    }
    if (rest != 0)
    {
        cout << rest;
    }
        for (int i = 1; i <= n; i++)
        {
           cout << result[i];
        }
}