#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, n, i;
  while (cin >> a >> b >> n) {
    for (i = -1000; i <= 1000; i++) {
      if (a * pow(i, n) == b) break;
    }
    if (a * pow(i, n) == b)
      cout << i << endl;
    else
      cout << "No solution\n";
  }
  return 0;
}
