#include <bits/stdc++.h>
using namespace std;
int fun(int i, int n) {
  int j;
  int num = 1;
  for (j = 0; j < n; j++) num *= i;
  return num;
}
int main() {
  int a, b, n;
  int k;
  int mid;
  int num;
  while (cin >> a >> b >> n) {
    if (b == 0) {
      printf("0\n");
      continue;
    }
    if (a == 0) {
      if (b != 0) {
        printf("No solution\n");
        continue;
      }
    }
    if (b % a != 0) {
      printf("No solution\n");
      continue;
    }
    k = b / a;
    if (n == 1) {
      printf("%d\n", k);
      continue;
    }
    if (n == 2) {
      if (k < 0) {
        printf("No solution\n");
        continue;
      }
      mid = sqrt(k * 1.0);
      if ((double)(mid) == sqrt(k * 1.0)) {
        printf("%d\n", mid);
        continue;
      } else {
        printf("No solution\n");
        continue;
      }
    }
    int flag = 0;
    for (int i = -10; i <= 10; i++) {
      num = fun(i, n);
      if (num == k) {
        flag = 1;
        printf("%d\n", i);
        break;
      }
    }
    if (!flag) printf("No solution\n");
  }
  return 0;
}
