- #include <iostream> 
- #include <cmath> 
- using namespace std; 
-   
- int main() 
- { 
- 	long long n, a, b, x, x0, fatique = 0; 
- 	cin >> n >> a >> b; 
- 	cin >> x0; 
- 	n--; 
- 	while (n--) { 
- 		cin >> x; 
- 		fatique += min(a * (x - x0), b); 
- 		x0 = x; 
- 	} 
- 	cout << fatique; 
- } 
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