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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int n;
- scanf("%d",&n);
- int ara[n+1];
- map<int,int>mp;
- for(int i=0;i<n;i++)
- {
- scanf("%d",&ara[i]);
- mp[ara[i]]++;
- }
- int cnt=1;
- while(cnt)
- {
- if(mp[cnt]==0)break;
- cnt++;
- }
- printf("%d\n",cnt);
- return 0;
- }
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