#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, n;
  cin >> a >> b >> n;
  for (long long i = -2001; i < 2001; i++) {
    if (a * pow(i, n) == b) {
      cout << i;
      return 0;
    }
  }
  cout << "No solution";
  return 0;
}
