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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. int c[100005];
  7.  
  8. int main() {
  9. 	long long int n, x, s=0;
  10. 	scanf("%lld%lld", &n, &x);
  11. 	for(int i=0; i<n; i++) scanf("%d", &c[i]);
  12. 	sort(c, c+n);
  13. 	for(int i=0; i<n; i++) { s+=c[i]*x; if(x>1) x--; }
  14. 	printf("%lld", s);
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3732KB
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https://ideone.com/41CElp
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

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