#include <bits/stdc++.h>
using namespace std;
int main(int argc, char *argv[]) {
  int A, B, n, X, Xn, i;
  scanf("%d%d%d", &A, &B, &n);
  for (X = -1001; X < 1001; X++) {
    Xn = 1;
    for (i = 0; i < n; i++) {
      Xn *= X;
      if (Xn > 10000 || Xn < -10000) break;
    }
    if (A * Xn == B) {
      printf("%d\n", X);
      return 0;
    }
  }
  printf("No solution\n");
  return 0;
}
