Submission #950297

#	Time	Username	Problem	Language	Result	Execution time	Memory
950297		vjudge1	Remittance (JOI19_remittance)	C++17	0 / 100	2 ms	604 KiB

remittance

// #pragma GCC target("avx2")
// #pragma GCC optimize("O3")
// #include <x86intrin.h>

#include <bits/stdc++.h>
#include <chrono>
#include <random>

// @author: Vlapos

namespace operators
{
	template <typename T1, typename T2>
	std::istream &operator>>(std::istream &in, std::pair<T1, T2> &x)
	{
		in >> x.first >> x.second;
		return in;
	}

	template <typename T1, typename T2>
	std::ostream &operator<<(std::ostream &out, std::pair<T1, T2> x)
	{
		out << x.first << " " << x.second;
		return out;
	}

	template <typename T1>
	std::istream &operator>>(std::istream &in, std::vector<T1> &x)
	{
		for (auto &i : x)
			in >> i;
		return in;
	}

	template <typename T1>
	std::ostream &operator<<(std::ostream &out, std::vector<T1> &x)
	{
		for (auto &i : x)
			out << i << " ";
		return out;
	}

	template <typename T1>
	std::ostream &operator<<(std::ostream &out, std::set<T1> &x)
	{
		for (auto &i : x)
			out << i << " ";
		return out;
	}

	template <typename T1>
	std::ostream &operator<<(std::ostream &out, std::multiset<T1> &x)
	{
		for (auto &i : x)
			out << i << " ";
		return out;
	}
}

// name spaces
using namespace std;
using namespace operators;
// end of name spaces

// defines
#define ll long long
#define ull unsigned long long
#define pb push_back
#define mp make_pair
#define pii pair<int, int>
#define pll pair<ll, ll>
#define f first
#define s second
#define uint unsigned int
#define all(vc) vc.begin(), vc.end()
// end of defines

// usefull stuff

void boost()
{
	ios_base ::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
}

inline int getbit(int &x, int &bt) { return (x >> bt) & 1; }

const int dx4[4] = {-1, 0, 0, 1};
const int dy4[4] = {0, -1, 1, 0};
const int dx8[8] = {-1, -1, -1, 0, 0, 1, 1, 1};
const int dy8[8] = {-1, -0, 1, -1, 1, -1, 0, 1};

const ll INF = (1e18) + 500;
const int BIG = (1e9) * 2 + 100;
const int MAXN = (1e5) + 5;
const int MOD7 = (1e9) + 7;
const int MOD9 = (1e9) + 9;
const uint MODFFT = 998244353;

#define int ll

struct test
{
	int n;
	vector<int> a, b;
	map<vector<int>, int> was;

	bool solve(int cntM)
	{
		if (was.find(a) != was.end())
			return false;
		bool good = true;
		for (int i = 0; i < n; ++i)
			if (a[i] != b[i])
				good = false;

		if (good)
			return true;

		if (cntM == 0)
			return false;

		for (int i = 0; i < n; ++i)
			if (a[i] >= 2)
			{
				a[i] -= 2;
				a[(i + 1) % n] += 1;
				if (solve(cntM - 2))
					return true;
				a[(i + 1) % n] -= 1;
				a[i] += 2;
			}
		was[a];
		return false;
	}

	void solve()
	{
		boost();
		cin >> n;
		a.resize(n);
		b.resize(n);
		bool good = true;
		for (int i = 0; i < n; ++i)
		{
			cin >> a[i] >> b[i];
			if (b[i] < a[i])
				good = false;
		}
		// if (good)
		// {
		// 	int d = 0;
		// 	for (int i = 0; i < n; ++i)
		// 		d += a[i] - b[i];
		// 	if (d % ((1LL << n) - 1))
		// 		cout << "No\n";
		// 	else
		// 		cout << "Yes\n";
		// 	return;
		// }
		int cntM = 0;
		for (int i = 0; i < n; ++i)
			cntM += a[i];
		if (solve(cntM))
			cout << "Yes\n";
		else
			cout << "No\n";
	}
};

main()
{
	boost();
	int q = 1;
	// cin >> q;
	for (int i = 0; i < q; i++)
	{
		test t;
		t.solve();
	}
	return 0;
}
//[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]//
//                                                                                    //
//                               Coded by Der_Vlἀpos                                  //
//                                                                                    //
//[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]//

Compilation message (stderr)

remittance.cpp: In member function 'void test::solve()':
remittance.cpp:144:8: warning: variable 'good' set but not used [-Wunused-but-set-variable]
  144 |   bool good = true;
      |        ^~~~
remittance.cpp: At global scope:
remittance.cpp:172:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  172 | main()
      | ^~~~

• Subtask 1: 0 / 15
• Subtask 2: 0 / 40
• Subtask 3: 0 / 45