31 lines
613 B
Plaintext
31 lines
613 B
Plaintext
# union set
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var n=4;
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var input=[[0,1],[0,2],[1,2]];
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var find_root=func(x,parent)
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{
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while(parent[x]!=nil)
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x=parent[x];
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return x;
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}
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var union_root=func(x,y,parent)
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{
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var x_root=find_root(x,parent);
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var y_root=find_root(y,parent);
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if(x_root==y_root) return 0;
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else parent[x_root]=y_root;
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return 1;
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}
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var makeConnect=func(n,connections)
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{
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if(size(connections)<n-1) return -1;
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var cnt=n-1;
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var parent=[];
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setsize(parent,n);
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foreach(var i;connections)
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if(union_root(i[0],i[1],parent))
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cnt-=1;
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return cnt;
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}
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println(makeConnect(n,input)); |