Submission #410622

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
410622	2021-05-23T07:32:29 Z	dynam1c	Strange Device (APIO19_strange_device)	C++17	Compilation error	0 ms	0 KB

strange_device

//#pragma comment(linker, "/stack:200000000")
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

#define endl "\n"
#define all(c) (c).begin(),(c).end()

// when you ponder, divide and conquer

#define lo __int128

lo gcd(lo x, lo y) {
	if (x == 0) return y;
	return gcd(y % x, x);
}

signed main() {
	// freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);
	std::ios::sync_with_stdio(false);
	cin.tie(0);
	
	ll n, a, b;
	cin >> n >> a >> b;
	lo g = gcd(b+1, (lo) a * b);
	lo m = (lo) a * b / g;
	vector<pair<lo, int>> evs;
	for (int i = 0; i < n; i++) {
		ll xl, xr;
		cin >> xl >> xr;
		xr++;
		lo l = xl % m;
		lo r = xr % m;
		if (r < l)
			evs.emplace_back(0, 1), evs.emplace_back(r, -1), evs.emplace_back(l, 1), evs.emplace_back(m, -1);
		else
			evs.emplace_back(l, 1), evs.emplace_back(r, -1);
	}
	sort(all(evs));
	ll res = 0;
	lo p = 0;
	int c = 0;
	for (auto [x, t] : evs) {
		if (c == 0) p = x;
		c += t;
		if (c == 0) res += x-p;
	}
	cout << res << endl;
}
/* --- PSolving ---
 * Simplifying (getting rid of variables, conditions, code logic, etc.)
 * Reframing
 * Solving a subtask (subgoal, aux. problem, removing a condition or fixing a parameter, etc.)
 * Inducing
 * Divide and conquer
 * Working backwards
 * Visual intuition
 * !! Reductions don't have to be specializations, they can be generalizations
 */

Compilation message

In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:84,
                 from strange_device.cpp:4:
/usr/include/c++/10/numeric: In instantiation of 'constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn) [with _Mn = long long int; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]':
strange_device.cpp:28:28:   required from here
/usr/include/c++/10/numeric:134:21: error: static assertion failed: gcd arguments are integers
  134 |       static_assert(is_integral_v<_Nn>, "gcd arguments are integers");
      |                     ^~~~~~~~~~~~~~~~~~
/usr/include/c++/10/numeric: In instantiation of 'constexpr std::common_type_t<_Mn, _Nn> std::__detail::__gcd(_Mn, _Nn) [with _Mn = long long int; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]':
/usr/include/c++/10/numeric:139:29:   required from 'constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn) [with _Mn = long long int; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]'
strange_device.cpp:28:28:   required from here
/usr/include/c++/10/numeric:104:49: error: use of deleted function 'void std::__detail::__abs_integral(bool)'
  104 |       return __m == 0 ? __detail::__abs_integral(__n)
      |                         ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/10/numeric:98:8: note: declared here
   98 |   void __abs_integral(bool) = delete;
      |        ^~~~~~~~~~~~~~
/usr/include/c++/10/numeric: In instantiation of 'constexpr std::common_type_t<_Mn, _Nn> std::__detail::__gcd(_Mn, _Nn) [with _Mn = __int128; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]':
/usr/include/c++/10/numeric:106:19:   required from 'constexpr std::common_type_t<_Mn, _Nn> std::__detail::__gcd(_Mn, _Nn) [with _Mn = long long int; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]'
/usr/include/c++/10/numeric:139:29:   required from 'constexpr std::common_type_t<_Mn, _Nn> std::gcd(_Mn, _Nn) [with _Mn = long long int; _Nn = __int128; std::common_type_t<_Mn, _Nn> = __int128]'
strange_device.cpp:28:28:   required from here
/usr/include/c++/10/numeric:104:49: error: use of deleted function 'void std::__detail::__abs_integral(bool)'
  104 |       return __m == 0 ? __detail::__abs_integral(__n)
      |                         ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/10/numeric:98:8: note: declared here
   98 |   void __abs_integral(bool) = delete;
      |        ^~~~~~~~~~~~~~
/usr/include/c++/10/numeric:105:39: error: use of deleted function 'void std::__detail::__abs_integral(bool)'
  105 |  : __n == 0 ? __detail::__abs_integral(__m)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/10/numeric:98:8: note: declared here
   98 |   void __abs_integral(bool) = delete;
      |        ^~~~~~~~~~~~~~