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  1. #include <iostream>
  2. #include<cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int n ;
  7. 	cin>> n;
  8. 	int a[1000][2]={0};
  9. 	for (int i=0;i<n;i++)
  10. 	cin>>a[i][0]>>a[i][1];
  11. 	double d,max=0;
  12.  
  13. 	for (int i=0;i<n;i++){
  14.  
  15. 	if (i<n-1)
  16. 	d=sqrt(pow(a[i][0]-a[i+1][0],2)+pow(a[i][1]-a[i+1][1],2));
  17. 	if (i==n-1)
  18. 	d=sqrt(pow(a[i][0]-a[0][0],2)+pow(a[i][1]-a[0][1],2));
  19. 	if (d>max)
  20. 	max=d;
  21. 	}
  22. 	printf("%.10lf",max);
  23.  
  24.  
  25. 	return 0;
  26. }
Success #stdin #stdout 0.01s 5544KB
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stdin
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5
315 271
-2 -621
-205 -511
-952 482
165 463
stdout
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1242.6013037173
https://ideone.com/XMY1RJ
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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