#include <bits/stdc++.h>
using namespace std;
int a, b, c, d;
bool solve(int v) {
  int sum = 1;
  for (int i = 1; i <= c; i++) {
    sum = sum * v;
    if (abs(sum) > abs(d)) return false;
  }
  if (sum == d)
    return true;
  else
    return false;
}
int main() {
  int flag;
  while (scanf("%d%d%d", &a, &b, &c) != EOF) {
    flag = 0;
    if (a == 0 && b == 0) {
      cout << "1" << endl;
      continue;
    } else if (a == 0 && b != 0) {
      cout << "No solution" << endl;
      continue;
    } else {
      d = b / a;
      if (a * d != b) {
        cout << "No solution" << endl;
        continue;
      }
      for (int i = -abs(d); i <= abs(d); i++) {
        if (solve(i)) {
          cout << i << endl;
          flag = 1;
          break;
        }
      }
      if (flag == 0) cout << "No solution" << endl;
    }
  }
  return 0;
}
