TIL about trigraphs in C and C++. Wat the fk!

trigraphs-c++

#include <iostream>
#include <vector>
#include <iterator>


using namespace std;

int main(int , char *[]) {

    vector<int> v1 = {0,1,2};
    vector<int> v2 <%v1<:0:>,not v1<:1:>?2:1,2%>;

    copy(v2.begin(),v2.end(),ostream_iterator<int>(cout,","));
    cout << endl;
    copy(v1.begin(),v1.end(),ostream_iterator<int>(cout,","));
    cout << endl;
    
    return 0;
}