#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, n;
  cin >> a >> b >> n;
  if (b == 0) {
    cout << 0 << endl;
    return 0;
  }
  for (long long x = -1000; x <= 1000; x++) {
    long long t = 1;
    for (int j = 1; j <= n; j++) {
      t = t * x;
      if (x > 1000) break;
    }
    if (a * t == b) {
      cout << x << endl;
      return 0;
    }
  }
  cout << "No solution" << endl;
}
