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  1. //COBBLED STREET
  2.  
  3. #include<cstdio>
  4. #include<iostream>
  5. #include<list>
  6. #include<vector>
  7. #include<utility>
  8. #include<map>
  9. #include<string.h>
  10. #include<algorithm>
  11.  
  12. using namespace std;
  13.  
  14. list<pair<long long int,pair<int,int> > > v;
  15.  
  16.  
  17. int parent[1008];
  18. int rank[1008];
  19.  
  20. int find(int x)
  21. {
  22. 	if(x!=parent[x])
  23. 	{parent[x]=find(parent[x]);}
  24.  
  25.  
  26. 	return parent[x];
  27. }
  28.  
  29. int main()
  30. {
  31. 	int t;
  32. 	scanf("%d",&t);
  33. 	while(t--)
  34. 	{
  35. 		int m,s,a,b,i;
  36. 		long long int c,p;
  37. 		scanf("%lld%d%d",&p,&m,&s);
  38.  
  39.  
  40. 		for(i=1;i<=s;i++)
  41. 		{
  42. 			scanf("%d%d%lld",&a,&b,&c);
  43. 			v.push_back(make_pair(c,make_pair(a,b)));
  44. 		}
  45.  
  46.  
  47. 		//sort(v.begin(),v.end());
  48. //		sort(v.begin(),v.end());
  49.            v.sort();
  50.  
  51. 	 for(i=1;i<=m;i++)
  52. 	 {
  53. 			parent[i]=i;
  54. 			rank[i]=0;
  55. 	}
  56. 	list<pair<long long int,pair<int,int> > >::iterator it;
  57. 	long long int sum1=0;
  58. 	long long int cost1=0;
  59.  
  60. 	for(it=v.begin();it!=v.end();it++)
  61. 	{
  62. 		//printf("hey yar this is me\n");
  63.  
  64. 		cost1=it->first;
  65. 		int x=it->second.first;
  66. 		int y=it->second.second;
  67.  
  68. 	//	printf("%d  %d   %d   %d   %d   %d   %d\n",cost,x,y,yr,z,rank[x],rank[y]);
  69. 		if(find(x)!=find(y))
  70. 		{
  71.            // printf("answer side is  %d  %d   %d\n",cost,x,y);
  72. 			sum1=sum1+cost1;
  73. 			if(rank[x]>rank[y])
  74. 			{parent[y]=x;}
  75. 			else
  76. 			{parent[x]=y;}
  77. 			if(rank[y]==rank[x])
  78. 			{rank[y]++;}
  79. 		}
  80. 	}
  81. 	//system("pause");
  82. 	sum1=sum1*p;
  83. 	printf("%lld\n",sum1);
  84.  
  85. 	}
  86.  
  87.  
  88. //	system("pause");
  89. 	return 0;
  90. }
  91.  
  92.  
Runtime error #stdin #stdout 0.02s 3308KB
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https://ideone.com/pAhcao
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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