#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, N, X;
  bool flag;
  double temp;
  cin >> A >> B >> N;
  flag = false;
  if (A == 0 && B == 0)
    printf("%d\n", N);
  else if (A == 0)
    printf("No solution\n");
  else if (B == 0)
    printf("0\n");
  else {
    temp = (double)B / (double)A;
    if (temp < 0) {
      flag = true;
    }
    temp = abs(temp);
    temp = pow(temp, 1 / (double)N);
    if (ceil(temp) - temp < 1e-6) {
      if (flag) {
        if (N % 2)
          printf("%d\n", -(int)ceil(temp));
        else
          printf("No solution\n");
      } else
        printf("%d\n", (int)ceil(temp));
    } else
      printf("No solution\n");
  }
  return 0;
}
