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- #include <iostream>
- #include <fstream>
- using namespace std;
- ifstream fin("izolate.in");
- ofstream fout("izolate.out");
- int n , a[105][105], g[105];
- int main()
- {
- int i , j;
- fin >> n;
- while(fin >> i >> j)
- {
- a[i][j] = a[j][i] = 1;
- }
- for(int i = 1 ; i <= n ; i++){
- g[i] = 0;
- for(int j = 1; j <= n ; ++j)
- if(a[i][j] == 1)
- g[i] ++;
- }
- int nrv = 0;
- for(int i = 1 ; i <= n ; i++)
- if(g[i] == 0)
- nrv ++;
- fout << nrv << " ";
- for(int i = 1 ; i <= n ; i++)
- if(g[i] == 0)
- fout << i << " ";
- return 0;
- }
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