#include <bits/stdc++.h>
#pragma comment(linker, "/STACK:60777216")
using namespace std;
int main() {
  int a, b, n;
  cin >> a >> b >> n;
  for (int x = -1000; x <= 1000; ++x) {
    long long curr_a = a;
    long long curr_b = b, tmp = 1;
    bool breaked = false;
    for (int i = 0; i < n; ++i) {
      tmp *= x;
      if (abs(curr_a) * abs(x) > abs(curr_b)) {
        breaked = true;
        break;
      }
    }
    if (breaked == false && tmp * curr_a == curr_b) {
      cout << x << endl;
      return 0;
    }
  }
  cout << "No solution" << endl;
  return 0;
}
