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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int a[100000],b[100000],c,d,e,f,i,j,k,l;
- cin>>c;
- for(j=0;j<100000;j++)
- {
- b[j]=0;
- }
- for(i=1;i<=c;i++)
- {
- cin>>a[i];
- b[a[i]]++;
- }
- for(i=1;i<100000;i++)
- {
- if(b[i]==0)
- {
- cout<<i<<endl;
- return 0;
- }
- }
- return 0;
- }
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