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- #include<fstream>
- #include <iostream>
- using namespace std;
- int n,m,s[101],a[101][101];
- int r;
- int t[101];
- ifstream f("arbore.in");
- ofstream g("arbore.out");
- void df(int prec,int x)
- {s[x]=1;
- t[x]=prec;
- for(int i=1;i<=n;i++)
- if(a[x][i]==1&&s[i]==0)
- df(x,i);
- }
- int main()
- {
- int k,i,j;
- f>>n>>k;
- while(f>>i>>j)
- {
- if(i!=j)a[i][j]=a[j][i]=1;
- }
- df(0,k);
- for(int i=1;i<=n;i++)
- g<<t[i]<<" ";
- }
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