제출 #150577

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
150577		준표야 함수컵은 캐리해줄거지? (#200)	Bulb Game (FXCUP4_bulb)	C++17	0 / 100	6 ms	5028 KiB

bulb

#include "bulb.h"
#include <vector>
#include <string.h>
#include <algorithm>
using namespace std;

const int MAXN = 300003;
int dp[MAXN][2][2];

int dfs(int cur, int f, int t, vector<int> &L, vector<int> &R) {
	
	if(cur<0) {
		if(t%2==0)
			return cur==-1;
		else 
			return cur==-2;
	}
	
	int &ret = dp[MAXN][f][t%2];
	if(ret!=-1) return ret;
	
	ret = 0;
	if(!f) {
		ret |= max(dfs(L[cur], !f, t, L, R), 
		dfs(L[cur], f, (t+1)%2, L, R)
		);
	}
	else {
		ret |= max(dfs(L[cur], !f, (t+1)%2, L, R), 
		dfs(L[cur], f, (t+2)%2, L, R)
		);
	}
	
	if(!f) {
		ret |= max(dfs(R[cur], !f, (t+1)%2, L, R), 
		dfs(R[cur], f, (t+2)%2, L, R)
		);
	}
	else {
		ret |= max(dfs(R[cur], !f, t, L, R), 
		dfs(R[cur], f, (t+1)%2, L, R)
		);
	}
	
	return ret;
}

int FindWinner(int T, vector<int> L, vector<int> R){
	int N = L.size();
	memset(dp, -1, sizeof(dp));
	T%=2;
	
	int ans = dfs(0, 0, T, L, R);
	return ans==1;
}

컴파일 시 표준 에러 (stderr) 메시지

bulb.cpp: In function 'int FindWinner(int, std::vector<int>, std::vector<int>)':
bulb.cpp:49:6: warning: unused variable 'N' [-Wunused-variable]
  int N = L.size();
      ^
bulb.cpp: In function 'int dfs(int, int, int, std::vector<int>&, std::vector<int>&)':
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
  int &ret = dp[MAXN][f][t%2];
             ~~~~~~~^
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]
bulb.cpp:19:20: warning: array subscript is above array bounds [-Warray-bounds]

• Subtask 1: 0 / 11
• Subtask 2: 0 / 25
• Subtask 3: 0 / 64