#include <bits/stdc++.h>
using namespace std;
int main() {
  long long A, B, n;
  cin >> A >> B >> n;
  long long i, j;
  if (A == 0) {
    if (B == 0) {
      cout << 0;
    } else
      cout << "No solution";
    return 0;
  }
  if (B % A) {
    cout << "No solution";
    return 0;
  }
  long long rez = B / A;
  if (rez == 1) {
    cout << 1;
    return 0;
  }
  if (B == 0) {
    cout << 0;
    return 0;
  }
  for (long long i = -1002; i <= 1002; i++) {
    long long cur = i;
    for (j = 2; j <= n; j++) {
      cur *= i;
      if (abs(cur) > 1000000000) break;
    }
    if (cur == rez) {
      cout << i;
      return 0;
    }
  }
  cout << "No solution";
  return 0;
}
