제출 #1323431

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1323431		adscoding	Remittance (JOI19_remittance)	C++20	15 / 100	14 ms	2132 KiB

remittance

#include <bits/stdc++.h>
#define fi first
#define se second
#define FOR(i, a, b) for (int i = a, _b = b; i <= _b; ++i)
#define FORD(i, a, b) for (int i = a, _b = b; i >= _b; --i)
#define FORLL(i, a, b) for (ll i = a, _b = b; i <= _b; ++i)
#define FORDLL(i, a, b) for (ll i = a, _b = b; i >= _b; --i)
#define all(x) x.begin(), x.end()
#define uni(x) sort(all(x)), x.erase(unique(all(x)), x.end())
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define dbg(...) debug(#__VA_ARGS__, __VA_ARGS__)
template<typename T>
void __prine_one(const char *&s, const T &x)
{
    while (*s == ' ') ++s;
    const char *p = s;
    int bal = 0;
    while (*s)
    {
        if (*s == '(') ++bal;
        else if (*s == ')') --bal;
        else if (*s == ',' && bal == 0) break;
        ++s;
    }
    cerr.write(p, s - p) << " = " << x;
    if (*s == ',')
    {
        cerr << "  ,  ";
        ++s;
    }
}

template<typename... Args>
void debug(const char *s, Args... args)
{
    cerr << "[  ";
    int dummy[] = {0, (__prine_one(s, args), 0)...};
    (void)dummy;
    cerr << "  ]\n\n";
}

template<class X, class Y>
    bool maximize(const X &a, const X &b)
    {
        if (a < b)
        {
            a = b;
            return true;
        }
        return false;
    }

template<class X, class Y>
    bool minimize(const X &a, const X &b)
    {
        if (a > b)
        {
            a = b;
            return true;
        }
        return false;
    }


// --------------------------------------------------------------------------------------------

const int maxn = 1e5 + 3;
int n, a[maxn], b[maxn], c[maxn];

// --------------------------------------------------------------------------------------------



namespace sub1
{
	bool approve()
	{
		if (n > 7)
			return false;
		FOR(i, 1, n)
			if (a[i] > 7 || b[i] > 7)
				return false;
		return true;
	}

	vector<int> state;
	set<vector<int>> vis;

	bool DFS()
	{
		bool c = true;
		FOR(i, 0, n - 1)
			if (state[i] != b[i + 1])
			{
				c = false;
				break;
			}

		if (c) return true;
		vis.insert(state);

		FOR(i, 0, n - 1)
			if (state[i] >= 2)
			{
				state[i] -= 2;
				state[(i + 1) % n]++;
				if (!vis.count(state) && DFS())
				{
					return true;
				}
				state[i] += 2;
				state[(i + 1) % n]--;
			}

		return false;
	}

	bool solve()
	{
		FOR(i, 1, n)
			state.push_back(a[i]);
		return DFS();
	}
}

namespace AC
{

	bool solve()
	{
		bool improve = true;
		FOR(i, 0, n - 1)
		{
			a[i] = a[i + 1];
			b[i] = b[i + 1];
		}
		while (improve)
		{
			improve = false;
			bool c = true;
			FOR(i, 0, n - 1)
			{
				if (a[i] - b[i] >= 1 && a[i] >= 2)
				{
					ll diff = max((a[i] - b[i] + 1) >> 1, a[i] / 2);
					a[(i + 1) % n] += diff;
					a[i] -= diff << 1;
					improve = true;
				}
			}
			ll sum = 0;
			FOR(i, 0, n - 1)
				sum += a[i] - b[i];

			if (sum < 0) return false;
			FOR(i, 0, n - 1)
				if (a[i] != b[i])
				{
					c = false;
					break;
				}
			if (c) return true;

			// FOR(i, 0, n - 1)
			// 	cerr << a[i] << ' ';
			// cerr << endl;
		}
		return false;
	}
}

bool solve()
{
	cin >> n;
	ll sum = 0;
	FOR(i, 1, n)
	{
		cin >> a[i] >> b[i];
		sum += a[i] - b[i];
	}

	if (sum < 0) return false;
	if (sub1 :: approve()) return sub1 :: solve();
	return AC :: solve();
}

signed main()
{
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    #define TASK "TEST"
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        freopen(TASK".OUT", "w", stdout);
    }
    solve() ? cout << "Yes" : cout << "No";
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

remittance.cpp: In function 'int main()':
remittance.cpp:198:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  198 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
remittance.cpp:199:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  199 |         freopen(TASK".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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