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  1. #include <cstdio>
  2. #include <algorithm>
  3. using namespace std;
  4.  
  5. int n, m, a, b, c, x[1100];
  6.  
  7. int main() {
  8. 	scanf("%d%d", &n, &m);
  9. 	for (int i = 1; i <= n; i++)	scanf("%d", &x[i]);
  10. 	double ans = 0;
  11. 	for (int i = 1; i <= m; i++) {
  12. 		scanf("%d%d%d", &a, &b, &c);
  13. 		ans = max(ans, 1.0 * (x[a] + x[b]) / c);
  14. 	}
  15. 	printf("%.15lf\n", ans);
  16. }
Success #stdin #stdout 0s 3304KB
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stdin
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Standard input is empty
stdout
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0.000000000000000
https://ideone.com/IuFRiu
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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