제출 #278707

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
278707		jairRS	늑대인간 (IOI18_werewolf)	C++17	컴파일 에러	0 ms	0 KiB

werewolf

#include "werewolf.h"
#include <set>
#include <vector>
#include <algorithm>
using namespace std;

set<int> adj[3004];
int memo[3004][2];

int dp(int curcity, int endcity, int l, int r, vector<bool> visited, int form = 0)
{
	if (form == 0 & curcity < l)
		return 0;
	if (form == 1 & curcity > r)
		return 0;
	if (curcity == endcity && form == 1)
		return 1;
	if (memo[curcity][form] != -1)
		return memo[curcity][form];

	visited[curcity] = true;

	int res = 0;
	for (int adjcity : adj[curcity])
	{
		if (visited[adjcity])
		{
			continue;
		}
		res += dp(adjcity, endcity, l, r, visited, form);
	}

	if (form != 1)
	{
		vector<bool> nvisited(visited.size());
		res += dp(curcity, endcity, l, r, nvisited, 1);
	}

	memo[curcity][form] = res;
	return res;
}

std::vector<int> check_validity(int N, std::vector<int> X, std::vector<int> Y,
								std::vector<int> S, std::vector<int> E,
								std::vector<int> L, std::vector<int> R)
{
	int Q = S.size();
	int M = X.size();
	for (int i = 0; i < M; i++)
	{
		adj[X[i]].insert(Y[i]);
		adj[Y[i]].insert(X[i]);
	}

	std::vector<int> A(Q);
	for (int i = 0; i < Q; i++)
	{
		vector<bool> nvisited(N);
		memset(memo, -1, sizeof(memo));
		int ans = dp(S[i], E[i], L[i], R[i], nvisited);
		ans = min(ans, 1);
		A[i] = ans;
	}
	return A;
}

컴파일 시 표준 에러 (stderr) 메시지

werewolf.cpp: In function 'int dp(int, int, int, int, std::vector<bool>, int)':
werewolf.cpp:12:11: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   12 |  if (form == 0 & curcity < l)
      |      ~~~~~^~~~
werewolf.cpp:14:11: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   14 |  if (form == 1 & curcity > r)
      |      ~~~~~^~~~
werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:59:3: error: 'memset' was not declared in this scope
   59 |   memset(memo, -1, sizeof(memo));
      |   ^~~~~~
werewolf.cpp:5:1: note: 'memset' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    4 | #include <algorithm>
  +++ |+#include <cstring>
    5 | using namespace std;