54. Spiral Matrix
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class Solution {public: void Spiral_Matrix(vector<vector<int>>& matrix,vector<int>& result, bool *visited,int dir_index,int x,int y,int x_len,int y_len) { if(result.size()==x_len*y_len) return; int dir[4][2]={{0,1},{1,0},{0,-1},{-1,0}}; int x0=x+dir[dir_index][0]; int y0=y+dir[dir_index][1]; if(x0<x_len&&y0<y_len&&x0>=0&&y0>=0&&!visited[x0*y_len+y0]) { visited[x0*y_len+y0]=true; result.push_back(matrix[x0][y0]); Spiral_Matrix(matrix,result,visited,dir_index,x0,y0,x_len,y_len); } else { if(dir_index>=3) dir_index=0; else dir_index++; Spiral_Matrix(matrix,result,visited,dir_index,x,y,x_len,y_len); } } vector<int> spiralOrder(vector<vector<int>>& matrix) { if(matrix.size()==0) return {}; if(matrix.size()==1) return matrix[0]; vector<int> result; int x_len=matrix.size(),y_len=matrix[0].size(); bool * visited=new bool[x_len*y_len]; memset(visited,0,x_len*y_len*sizeof(bool)); result.push_back(matrix[0][0]); visited[0]=true; Spiral_Matrix(matrix,result,visited,0,0,0,x_len,y_len); return result; }};
这句出现错误
memset(visited,x_len*y_len*sizeof(bool),0);
改成
memset(visited,0,x_len*y_len*sizeof(bool));
就ac了,
然而
memset(visited,x_len*y_len*sizeof(bool),false);
也能ac
好奇怪
0 0
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