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- #include <fstream>
- using namespace std;
- ifstream f("BFS.in");
- ofstream g("BFS.out");
- int n,m,x,i,z,y,u,p,c[1001],viz[1001],a[1001][1001];
- int main()
- {f>>n>>m>>x;
- for(i=1;i<=m;i++)
- {
- f>>y>>z;
- a[z][y]=a[y][z]=1;
- }
- p=1;
- u=1;
- c[p]=x;
- viz[x]=1;
- while(p<=u)
- {
- x=c[p];
- p++;
- for(i=1;i<=n;i++)
- if(a[x][i]==1&&viz[i]==0)
- {
- ++u;
- c[u]=i;
- viz[i]=1;
- }
- }
- for(i=1;i<=u;i++)
- g<<c[i]<<" ";
- return 0;
- }
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