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semsem_elazazy

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semsem_elazazy
Apr 21st, 2022
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  1. #include <iostream>
  2. #include<bits/stdc++.h>
  3. #include<utility>
  4. #include <queue>
  5. #define ll long long
  6. #define ull unsigned long long
  7. #define pi  3.14159
  8.  
  9. #define OO  2000000000
  10. //#define ceil(w, m) (((w) / (m)) + ((w) % (m) ? 1 : 0))
  11. using namespace std;
  12.  
  13. void yasmeen_fakhri(){
  14.   ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
  15.   #ifndef ONLINE_JUDGE  
  16.     freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  17.   #endif
  18. }
  19.  
  20. int main() {
  21.    yasmeen_fakhri();
  22. ll n; cin>>n;
  23. ll freq[2*100005] = {0};
  24. ll m =0 ;
  25. for(int i =0 ; i< n ; i++){
  26.     ll num ; cin>>num;
  27.     freq[num]++;
  28.    
  29. }
  30. for  ( ll i =0  ; i< 2*100005 ; i++){
  31.     if (freq[i] > 0 ){
  32.         m++;
  33.      
  34.     }
  35. }
  36.  
  37. cout<<m;
  38.  
  39. return 0;
  40. }
  41.  
  42.  
  43.  
  44.  
  45.  
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