题解

#include <iostream>

using namespace std;

int sumOfDigits(int n) {
    int sum = 0;
    while (n > 0) {
        sum += n % 10;
        n /= 10;
    }
    return sum;
}

int main() {
    int L, D, X;
    cin >> L >> D >> X;

    int N = L;
    while (sumOfDigits(N) != X || N < L) {
        N++;
    }

    int M = D;
    while (sumOfDigits(M) != X || M > D) {
        M--;
    }

    cout << N << endl;
    cout << M << endl;

    return 0;
}