#include <bits/stdc++.h>
using namespace std;
const double PI = acos(-1.0);
const double eps = 1e-8;
template <class T>
T sqr(T x) {
  return x * x;
}
int gcd(int a, int b) { return (b == 0) ? a : gcd(b, a % b); }
int main(int argc, char** argv) {
  double ans = 0;
  double a, b;
  int n;
  scanf("%lf%lf%d", &a, &b, &n);
  if (a == 0) {
    if (b == 0)
      ans = 0;
    else
      ans = 0.5;
  } else
    ans = pow(abs(b / a), 1.0 / n);
  if (b / a < 0 && n % 2 == 0) ans = 0.5;
  if (b / a < 0 && n % 2 == 1) ans = -ans;
  if (abs(ans - round(ans)) < eps)
    printf("%d\n", (int)round(ans));
  else
    printf("No solution\n");
  return (EXIT_SUCCESS);
}
