#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
int n, m, d;
bool visited[10];
void answer(int val) {
if (~val) cout << val;
else cout << "NESIDALO";
exit(0);
}
void add_digit(int &rem, int &sum, int digit) {
rem = rem * 10 + digit;
sum += rem / d;
rem %= d;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> m >> d;
if (n % m != 0) answer(-1);
int groups = n / m, len = m - 1;
if (d == 1) answer(groups);
int sum = 0, rem = 1;
FOR(i, 2, groups + 1) {
FOR(j, 0, len) add_digit(rem, sum, 0);
add_digit(rem, sum, 1);
if (!rem) answer(groups % i ? -1 : sum * (groups / i));
else if (visited[rem]) answer(-1);
else visited[rem] = true;
}
answer(rem ? -1 : sum);
return 0;
}
