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#include<iostream> using namespace std; int main() { int n,m,ticket; while(1) { int dubli=0,check[10001]={0}; cin>>n>>m; if(n == 0 && n ==0 ) { break; } for(int i =0;i<m;i++) { cin>>ticket; check[ticket]++; } for(int j =1;j<=n;j++) { if(check[j]>1) { dubli++; } } cout<<dubli<<endl; } return 0; }
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