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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. map<int, int>vis;
  4. int main(){
  5.  
  6. 	int a, b;
  7. 	int d, c;
  8. 	cin >> a >> b >> c >> d;
  9.  
  10. 	map<int, int>vis;
  11. 	for (int i = 0; i <= 150; i++){
  12. 		vis[b + a*i] = 1;
  13. 	}
  14. 	for (int i = 0; i <= 150; i++){
  15. 		if (vis[d + c*i])
  16. 			return cout << d + c*i << endl, 0;
  17. 	}
  18. 	puts("-1");
  19. 	return 0;
  20. }
  21.  
  22.  
  23.  
  24.  
  25.  
  26.  
Success #stdin #stdout 0s 16064KB
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stdin
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5 20
9 20
stdout
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20
https://ideone.com/axEBqs
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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