Submission #71645

#	Time	Username	Problem	Language	Result	Execution time	Memory
71645		imsifile	Lokahian Rampart (FXCUP3_lokahia)	C++98	100 / 100	1256 ms	178176 KiB

sungjin

#include "sungjin.h"

static int N, M, ba[1010][1010], chk[1010][1010], xx[4]={1,-1,0,0}, yy[4]={0,0,1,-1}; // DURL

static void dfs1(int x, int y){
	if(x<0 || y<0 || x>N+1 || y>M+1) return;
	if(chk[x][y]) return;
	chk[x][y]=-1;
	for(int i=0; i<4; i++){
		if(ba[x][y]&(1<<i)) continue;
		dfs1(x+xx[i], y+yy[i]);
	}
}

static int col;
static void dfs2(int x, int y){
	if(x<=0 || y<=0 || x>N || y>M) return;
	if(chk[x][y]) return;
	chk[x][y]=col;
	for(int i=0; i<4; i++) dfs2(x+xx[i], y+yy[i]);
}

void Init(int N_, int M_, int W, int R[], int C[], int dir[]) {
	N=N_, M=M_;
	for(int i=W; i--;){
		if(dir[i]==1) ba[R[i]][C[i]+1] |= 1<<3;
		if(dir[i]==2) ba[R[i]][C[i]-1] |= 1<<2;
		if(dir[i]==3) ba[R[i]+1][C[i]] |= 1<<1;
		if(dir[i]==4) ba[R[i]-1][C[i]] |= 1<<0;
	}
	dfs1(0,0);
	for(int i=1; i<=N; i++){
		for(int j=1; j<=M; j++){
			if(chk[i][j]) continue;
			++col; dfs2(i,j);
		}
	}
}

int WereSameTerritory(int R1, int C1, int R2, int C2) {
	if(chk[R1][C1]<0 || chk[R2][C2]<0) return 0;
	return chk[R1][C1] == chk[R2][C2];
}

dowoon

#include "dowoon.h"

static int N, M, ba[1010][1010], my, no, xx[4]={1,-1,0,0}, yy[4]={0,0,1,-1};

static void dfs(int x, int y, int hx, int hy){
	if(x<=0 || y<=0 || x>N || y>M) return;
	if(ba[x][y]) return;
	if(Ask(x,y,hx,hy)) ba[x][y]=1, my++;
	else{ ba[x][y]=-1; no++; return; }

	for(int i=0; i<4; i++) dfs(x+xx[i], y+yy[i], hx, hy);
}

int Guess(int N_, int M_) {
	N=N_, M=M_;
	for(int j=1; j<M; j++){
		for(int i=1; i<=N; i++){
			if(2*no >= N*M) return 0;
			if(ba[i][j] || ba[i][j+1]) continue;
			int st=i, k, fl=0;
			for(k=st; k<=N; k++){
				if(ba[k][j] || ba[k][j+1]) break;
				int a = Ask(k,j,k,j+1);
				if(a){ fl=1; break; }
			}
			if(!fl){
				i=k-1;
				while(--k >= st) ba[k][j]=-1, no++;
				continue;
			}

			ba[k][j]=ba[k][j+1]=1; my=2;
			for(int k2=k-1; k2>=st; k2--){
				int a = Ask(k2,j,k2+1,j);
				if(a) ba[k2][j]=1, ba[k2][j+1]=-1, my++, no++;
				else{
					ba[k2][j]=-1, no++;
					while(--k2 >= st) ba[k2][j]=-1, no++;
					break;
				}
			}
			dfs(k+1, j, k, j);
			dfs(k+1, j+1, k, j);
			dfs(k, j+2, k, j);
			dfs(k-1, j+1, k, j);

			if(my*2 > N*M) return 1;
			no+=my, my=0;
			i=k-1;
		}
	}
	return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 87 / 87