Envío 2892

Código

#include <iostream>

using namespace std;

int main(void) {
    string x;
    int k;
    cin >> x;
    cin >> k;

    int length = x.length() - 1, i = length, carry = 0;
    while (i >= 0) {
        if (i == length)
            x[i] += k;

        x[i] += carry;
        if (x[i] > 57)
        {
            int sum = (int)x[i] - 48;
            int unit = sum % 10;
            x[i] = unit + 48;
            carry = 1;
        }
        else
            break;

        if (i >= 0)
            --i;
    }

    if ((i < 0 && carry == 1) || x[0] == '0') {
        string res = '1' + x;
        cout << res << endl;
    }
    else
        cout << x << endl;

    return (0);
}