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  1. #include <iostream>
  2. #include <map>
  3. #include <bitset>
  4. using namespace std;
  5.  
  6. map<int, int> fr;
  7.  
  8. int main() {
  9.     bitset<1000010> fr;
  10.     bitset<1000010> db;
  11.     int x, nr = 0;
  12.     while(cin >> x) {
  13.     	if(fr[x]) db[x] = 1;
  14.         fr[x] = 1;
  15.     }
  16.     for (int i = 1; i <= 1000000; i++) {
  17.         if(fr[i] && !db[i])
  18.             nr++;
  19.     }
  20.     cout << nr;
  21. }
  22.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
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5 4 3 2 3 3 5 6 4 3 3
stdout
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2
https://ideone.com/3nI5Zd
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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