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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int a[100000],size[10000];
  4. int find_parent(int x){
  5. 	if(x!=a[x]){
  6. 		find_parent(a[x]);
  7. 	}
  8. 	return a[x];
  9. }
  10. int uniono (int ay,int b){
  11. 	int g=0;
  12. 	int x=find_parent(ay);
  13. 	int y=find_parent(b);
  14. 	if(size[x]>size[y]){
  15. 		a[y]=x;
  16. 		g=size[x]-size[y];
  17. 		size[x]+=size[y];
  18. 	}
  19. 	else{
  20. 		a[x]=y;
  21. 		g=size[y]-size[x];
  22. 		size[y]+=size[x];
  23. 	}
  24. 	return g;
  25. }
  26. int main() {
  27.    int n,q,i,j,ay,b,ans;
  28.    cin>>n>>q;
  29.    for(i=1;i<=n;i++){
  30.    	a[i]=i;
  31.    	size[i]=1;
  32.    }
  33.    for(i=0;i<q;i++){
  34.    	cin>>ay>>b;
  35.    	ans=uniono(ay,b);
  36.    	cout<<ans<<endl;
  37.    }
  38. }
Success #stdin #stdout 0s 3844KB
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https://ideone.com/RjiPXG
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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