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