#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, n;
  cin >> a >> b >> n;
  for (int i = -abs(b); i <= abs(b); i++) {
    int q = 1;
    for (int k = 1; k <= n; k++) {
      q *= i;
    }
    if (a * q == b) {
      cout << i;
      return 0;
    }
  }
  cout << "No solution";
  return 0;
}
