#include <iostream>
#include <cstdlib>
#include <vector>
using namespace std;
const int NOT_DIV = -1;
int N, M, D;
void print_and_exit(int data) {
if (data == NOT_DIV) {
cout << "NESIDALO\n";
}
else {
cout << data << '\n';
}
exit(0);
}
void advance(int &rem, int &sum, int digit) {
rem = rem * 10 + digit;
sum += rem / D;
rem %= D;
}
int main(int argc, char const *argv[]) {
cin >> N >> M >> D;
if (N % M != 0) {
print_and_exit(NOT_DIV);
}
int groups = N / M, zeros = M - 1;
if (D == 1) {
print_and_exit(groups);
}
int sum = 0, rem = 1;
vector <bool> saw_rem(10, false);
for (int g = 2; g <= groups; g++) {
for (int z = 0; z < zeros; z++) {
advance(rem, sum, 0);
}
advance(rem, sum, 1);
if (rem == 0) {
print_and_exit((groups % g == 0) ? sum * (groups / g) : NOT_DIV);
}
else if (saw_rem[rem]) {
print_and_exit(NOT_DIV);
}
else {
saw_rem[rem] = true;
}
}
print_and_exit((rem == 0) ? sum : NOT_DIV);
return 0;
}
