leetcode 289生命游戏

class Solution {
public:
    vector<vector<int>> dirs={{,},{,},{,},{,-},{,-},{-,-},{-,},{-,}};
    void gameOfLife(vector<vector<int>>& board) {
        //time O(2*9*m*n)
        int r=board.size();
        if(r==) return;
        int c=board[].size();
        if(c==) return;
        vector<vector<int>> cur(r,vector(c,));

        for(int i=;i<r;i++){
            for(int j=;j<c;j++){
                for(auto dir:dirs){
                    int x=i+dir[],y=j+dir[];
                    if(x< || x>=r || y< || y>=c) continue;
                    cur[i][j]+=board[x][y];
                }
            }
        }
        for(int i=;i<r;i++){
            for(int j=;j<c;j++){

                if( cur[i][j]== || board[i][j]== && cur[i][j]== )
                    board[i][j]=;
                else
                    board[i][j]=;
            }

        }
    }
};