#include <bits/stdc++.h>
using namespace std;
int a, b, n;
int abs(int x) { return (x < 0) ? (-x) : (x); }
int main() {
  scanf("%d%d%d", &a, &b, &n);
  for (int i = 0; i <= 1000; i++) {
    int tmp = a;
    for (int j = 0; j < n; j++) tmp *= i;
    if (abs(tmp) > abs(b)) break;
    if (tmp == b) {
      printf("%d\n", i);
      return 0;
    }
  }
  for (int i = -1; i >= -1000; i--) {
    int tmp = a;
    for (int j = 0; j < n; j++) tmp *= i;
    if (abs(tmp) > abs(b)) break;
    if (tmp == b) {
      printf("%d\n", i);
      return 0;
    }
  }
  printf("No solution\n");
}
