#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, n;
  cin >> A >> B >> n;
  for (int x = -1000; x <= 1000; x++)
    if (abs(A * pow(x, n) - B) < 0.0001) {
      cout << x << endl;
      return 0;
    }
  cout << "No solution" << endl;
}
