Submission #618582

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using ull = unsigned long long;
using ll = long long;
using ld = long double;
template <typename T>
using V = vector<T>;
template <typename T>
using VV = vector<vector<T>>;
class counter_iterator{
    std::size_t i ;
public :
    counter_iterator() : i(0) { }
    counter_iterator( std::size_t n ) : i(n) { }
    bool operator == ( const counter_iterator & rhs ) const { return i == rhs.i ; }
    bool operator != ( const counter_iterator & rhs ) const { return i != rhs.i ; }
    std::size_t & operator * () { return i ; }
    counter_iterator & operator ++ (){ ++i ; return *this ; } 
} ;
class nth_loop{
    std::size_t i ;
public :
    nth_loop( std::size_t n ) : i(n) { }
    counter_iterator begin() const { return counter_iterator() ; }

    counter_iterator end() const { return counter_iterator(i) ; }
} ;
nth_loop rep( std::size_t n ) { return nth_loop( n ) ; }
nth_loop operator "" _th( unsigned long long int n ) { return nth_loop( n ) ; }

int main()
{
    ll f,s;
    cin >> f >> s;
    cout << f-s << endl;
}

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