#include <bits/stdc++.h>
using namespace std;
void fastcode() {
  std::ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
int fr[3001] = {0};
int main() {
  fastcode();
  int a, b, n;
  cin >> a >> b >> n;
  double x = 0;
  for (double i = -1000; i <= 1000; i++) {
    if (a * pow(i, n) == b) {
      cout << i;
      return 0;
    }
  }
  cout << "No solution";
  return 0;
}
