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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Main
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Scanner in = new Scanner(System.in);
  10. 		int n = in.nextInt(), count = 0, t, m;
  11. 		int a[][] = new int[n + 1][2];
  12. 		a[count][1] = 0;
  13. 		a[count][0] = -1;
  14. 		count++;
  15. 		long sumr = 0;
  16. 		for(int i = 0; i < n; i++){
  17. 			t = in.nextInt();
  18. 			m = in.nextInt();
  19. 			if(m == 0){
  20. 				a[count][1] = a[a[t][0]][1];
  21. 				a[count][0] = a[a[t][0]][0];
  22. 			}else{
  23. 				a[count][1] = a[t][1] + m;
  24. 				a[count][0] = t;
  25. 			}
  26. 			sumr += a[count][1];
  27. 			count++;
  28. 		}
  29. 		System.out.println(sumr);
  30. 	}
  31. }
Success #stdin #stdout 0.06s 2184192KB
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https://ideone.com/GXeL0V
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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