#include <bits/stdc++.h>
using namespace std;
int main() {
  int i, j, a, b, n;
  cin >> a >> b >> n;
  for (i = -1000; i <= 1000; i++) {
    long long prod = a;
    for (j = 0; j < n; j++) {
      prod *= i;
      if (abs(prod) > abs(b)) break;
    }
    if (j < n) continue;
    if (prod == b) break;
  }
  if (i <= 1000)
    printf("%d\n", i);
  else
    printf("No solution\n");
  return 0;
}
