#include <bits/stdc++.h>
using namespace std;
int a, b, n;
int main() {
  int i, j;
  while (scanf("%d%d%d", &a, &b, &n) != EOF) {
    if (a == 0) {
      if (b == 0) {
        printf("1\n");
        continue;
      } else {
        printf("No solution\n");
        continue;
      }
    }
    if (b % a != 0) {
      printf("No solution\n");
      continue;
    }
    int c = abs(b / a);
    int low = -1, high = 1001, mid;
    while (high - low > 1) {
      mid = (high + low) / 2;
      int tmp = 1;
      for (j = 0; j < n; j++) {
        tmp *= mid;
        if (tmp > c) break;
      }
      if (tmp >= c)
        high = mid;
      else
        low = mid;
    }
    int tt = 1;
    for (j = 0; j < n; j++) tt *= high;
    if (tt == b / a) {
      printf("%d\n", high);
      continue;
    }
    tt = 1;
    for (j = 0; j < n; j++) tt *= -high;
    if (tt == b / a) {
      printf("%d\n", -high);
      continue;
    }
    printf("No solution\n");
  }
  return 0;
}
