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| class Solution {
boolean flag=false;
public boolean exist(char[][] board, String word) {
boolean[][] skipped=new boolean[board.length][board[0].length];
for(int i=0;i<board.length;i++){
for(int j=0;j<board[i].length;j++){
if(board[i][j]==word.charAt(0)){
skipped[i][j]=true;
func(board,skipped,word,0,i,j);
skipped[i][j]=false;
}
}
if(flag)break;
}
return flag;
}
void func(char[][] board,boolean[][]skipped,String word,int index,int r,int c){
if(index==word.length()-1){
flag=true;
return;
}
if(r>0&&board[r-1][c]==word.charAt(index+1)&&!skipped[r-1][c]){
skipped[r-1][c]=true;
func(board,skipped,word,index+1,r-1,c);
skipped[r-1][c]=false;
}
if(r<board.length-1&&board[r+1][c]==word.charAt(index+1)&&!skipped[r+1][c]){
skipped[r+1][c]=true;
func(board,skipped,word,index+1,r+1,c);
skipped[r+1][c]=false;
}
if(c>0&&board[r][c-1]==word.charAt(index+1)&&!skipped[r][c-1]){
skipped[r][c-1]=true;
func(board,skipped,word,index+1,r,c-1);
skipped[r][c-1]=false;
}
if(c<board[r].length-1&&board[r][c+1]==word.charAt(index+1)&&!skipped[r][c+1]){
skipped[r][c+1]=true;
func(board,skipped,word,index+1,r,c+1);
skipped[r][c+1]=false;
}
}
}
|
