#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, n;
  while (cin >> a >> b >> n) {
    if (b == 0 && a == 0) {
      cout << 1 << endl;
      continue;
    }
    if (b == 0) {
      cout << 0 << endl;
      continue;
    }
    if (a == 0) {
      cout << "No solution" << endl;
      continue;
    }
    if (b % a != 0) {
      cout << "No solution" << endl;
    } else {
      int flag = 0;
      long long x = b / a;
      for (int j = -1000; j <= 1000; j++) {
        long long num = 1;
        for (int i = 0; i < n; i++) {
          num *= j;
        }
        if (num == x) {
          flag = 1;
          cout << j << endl;
          return 0;
        }
      }
      if (!flag) cout << "No solution" << endl;
    }
  }
  return 0;
}
