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#include <bits/stdc++.h> using namespace std; int main() { long long n,c=0,dem[1000]={0},xmax=0; cin >> n; long long a[205]; for (int u = 0; u < n; u++) { cin >> a[u]; dem[a[u]]++; if (xmax<a[u]) xmax=a[u]; } for (int u=0; u<=xmax; u++ ) { if (dem[u]!=0)c++; } cout << c; return 0; }
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