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#include <bits/stdc++.h> #define ll long long #define endl '/n' using namespace std; int main() { ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL); // Code goes here // int n; cin>>n; set <int> s; for (int i =0 ; i<n;i++) { int x; cin>>x; if (x>0) s.insert(x); } for (int i=1 ; i<=n+1 ; i++) { if (!s.count(i)) { cout<<i; break; } } }
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