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답안 #718870

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
718870 2023-04-05T04:08:18 Z edenooo Weird Numeral System (CCO21_day1problem2) C++17
8 / 25
 27 ms 27040 KB 
#include<bits/stdc++.h>
using namespace std;

#define INF 1234567890
#define ll long long

bool rev;
ll N;
int K, Q, D, M;
int A[5001], n[80];
bool suf[81];
vector<int> X[1000000];
int dp[80][10001];

int f(int i, int j)
{
	if (i > 0 && suf[i] && j == 0) return true;
	if (i >= 80) return false;

	int &ret = dp[i][j+5000];
	if (ret != -1) return ret;
	ret = 0;

	// j+x = n[i] (mod K)인 x를 사용해야 한다.
	for(int x : X[((n[i]-j)%K+K)%K])
		if (f(i+1, (j+x-n[i] >= 0 ? (j+x-n[i])/K : -((-(j+x-n[i])+K-1)/K))))
		{
			ret = 1;
			break;
		}
	return ret;
}

void g(int i, int j)
{
	if (i > 0 && suf[i] && j == 0) return;
	int &ret = dp[i][j+5000];

	for(int x : X[((n[i]-j)%K+K)%K])
		if (f(i+1, (j+x-n[i] >= 0 ? (j+x-n[i])/K : -((-(j+x-n[i])+K-1)/K))))
		{
			g(i+1, (j+x-n[i] >= 0 ? (j+x-n[i])/K : -((-(j+x-n[i])+K-1)/K)));
			cout << (rev ? -x : x) << " \n"[i==0];
			break;
		}
}

int main()
{
	ios::sync_with_stdio(0); cin.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	cin >> K >> Q >> D >> M;
	for(int i=1; i<=D; i++)
	{
		cin >> A[i];
	}
	while(Q--)
	{
		// clear
		rev = false;
		for(int i=0; i<1000000; i++)
			X[i].clear();
		memset(dp, -1, sizeof(dp));

		cin >> N;
		if (N < 0)
		{
			rev = true;
			N = -N;
			for(int i=1; i<=D; i++)
				A[i] = -A[i];
		}
		for(int i=0; i<80; i++)
		{
			n[i] = N % K;
			N /= K;
		}
		suf[80] = true;
		for(int i=79; i>=0; i--)
			suf[i] = suf[i+1] && (n[i] == 0);

		for(int i=1; i<=D; i++)
			X[(A[i]%K+K)%K].push_back(A[i]);

		if (!f(0, 0)) cout << "IMPOSSIBLE\n";
		else
		{
			// 역추적
			g(0, 0);
		}

		if (rev)
			for(int i=1; i<=D; i++)
				A[i] = -A[i];
	}
	return 0;
}

Compilation message

Main.cpp: In function 'void g(int, int)':
Main.cpp:37:7: warning: unused variable 'ret' [-Wunused-variable]
   37 |  int &ret = dp[i][j+5000];
      |       ^~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 26836 KB OK
2 Correct 22 ms 26836 KB OK
3 Correct 23 ms 26892 KB OK
4 Correct 25 ms 26908 KB OK
5 Correct 25 ms 26836 KB OK
6 Correct 25 ms 27012 KB OK
7 Correct 27 ms 26944 KB OK
8 Correct 23 ms 27040 KB OK

Subtask #2
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 26836 KB OK
2 Correct 22 ms 26836 KB OK
3 Correct 23 ms 26892 KB OK
4 Correct 25 ms 26908 KB OK
5 Correct 25 ms 26836 KB OK
6 Correct 25 ms 27012 KB OK
7 Correct 27 ms 26944 KB OK
8 Correct 23 ms 27040 KB OK
9 Correct 24 ms 26924 KB OK
10 Correct 26 ms 26920 KB OK
11 Correct 24 ms 26836 KB OK
12 Correct 26 ms 26884 KB OK
13 Correct 27 ms 26880 KB OK
14 Correct 24 ms 26936 KB OK
15 Correct 23 ms 26928 KB OK
16 Incorrect 23 ms 26836 KB Query 1: Jury has an answer but participant does not
17 Halted 0 ms 0 KB -