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G - Line CodeForces - 7C

2023-03-30

Alineontheplaneisdescribedbyanequation Ax+By+C=0.Youaretofindanypointonthisline,whosecoordinatesareintegernumbersfrom -5·1018 to 5

A line on the plane is described by an equation Ax + By + C = 0. You are to find any point on this line, whose coordinates are integer numbers from  - 5·1018 to 5·1018 inclusive, or to find out that such points do not exist.

Input

The first line contains three integers AB and C ( - 2·109 ≤ A, B, C ≤ 2·109) — corresponding coefficients of the line equation. It is guaranteed that A2 + B2 > 0.

Output

If the required point exists, output its coordinates, otherwise output -1.

Examples

Input

2 5 3

Output

6 -3

题解:初看这一题,没有想到这个是一道拓展欧几里得题,感觉答案也不唯一,仔细考虑了一下,发现了答案确实只有一个,因为他有一个确定的c,然后这个答案还与a与b的公倍数有关,cai'才知道这就是一道欧几里得的题。

 

思路:将ax+by+c=0,化为ax+by=-c/gcd(a,b)*gcd(a,b)

  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int maxn = 1e5 + 10;
  4. const int mod = 1e9 + 7;
  5. long long exgcd(long long a, long long b, long long &x, long long &y)
  6. {
  7. if (b == 0)
  8. {
  9. x = 1, y = 0;
  10. return a;
  11. }
  12. long long g = exgcd(b, a % b, x, y);
  13. long long t;
  14. t = x, x = y, y = t - (a / b) * y;
  15. return g;
  16. }
  17. int main()
  18. {
  19. long long a, b, c, x, y;
  20. cin >> a >> b >> c;
  21. long long t = exgcd(a, b, x, y);
  22. if (c % t == 0) printf("%lld %lld\n", -x * c / t, -y * c / t);
  23. else printf("-1\n");
  24. return 0;
  25. }