#include <bits/stdc++.h>
using namespace std;
int a, b, n;
int main() {
  while (~scanf("%d %d %d", &a, &b, &n)) {
    int flag = 20000;
    for (int i = -2010; i <= 2010; i++) {
      if (a * pow(i, n) == b) {
        flag = i;
        break;
      }
    }
    if (flag == 20000)
      printf("No solution\n");
    else
      printf("%d\n", flag);
  }
  return 0;
}
