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  1. #include<cstdio>
  2. #include<cstring>
  3. #include<algorithm>
  4. #include<vector>
  5. #define rep(i,a,b) for(int i=a;i<=b;i++)
  6. using namespace std;
  7. typedef long long ll;
  8. const ll mod = 1000000007;
  9. const int maxn=2e5;
  10. int q,n=1,v[maxn+1];
  11. vector<int> g[maxn+1];
  12. ll pv[maxn+1];
  13. void dfs(int u)
  14. {
  15. 	for(int v:g[u])dfs(v);
  16. 	int tt=1;
  17. 	pv[u]=v[u];
  18. 	for(int v:g[u]){pv[u]+=pv[v];tt++;}
  19. 	pv[u]%=mod;
  20. 	pv[u]*=tt;
  21. 	pv[u]%=mod;
  22. }
  23. int main()
  24. {
  25. 	scanf("%d %d",&v[n],&q);
  26. 	bool change = true;
  27. 	rep(i,1,q)
  28. 	{
  29. 		int t;
  30. 		scanf("%d ",&t);
  31. 		if(t == 1) {
  32. 			int p;
  33. 			++n;
  34. 			scanf("%d %d\n",&p,&v[n]);
  35. 			g[p].push_back(n);
  36. 			change = true;
  37. 		}else {
  38. 			int x;
  39. 			scanf("%d\n",&x);
  40. 			if(change) {
  41. 				dfs(1);
  42. 			}
  43. 			printf("%lld\n",pv[x]);
  44. 			change = false;
  45. 		}
  46. 	}
  47. 	return 0;
  48. }
  49.  
Success #stdin #stdout 0s 8140KB
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https://ideone.com/8tvGco
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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