LeetCode 54. Spiral Matrix

Posted 2022-09-13 dacc123

题目

水题

class Solution 
public:

    vector<int> spiralOrder(vector<vector<int>>& matrix) 
        
        int i=0,j=0;
        vector<int> ans;
        int s=matrix.size();
        if(s==0)
            return ans;
        int e=matrix[0].size();
        if(e==0)
            return ans;
        
        
      
        
        int posi=1;
        int posj=0;
        while(true)
        
            while(j<e)
                
                ans.push_back(matrix[i][j]);
                j++;
            
            
            j--;
            
            int tag=0;
            i++;
            while(i<s)
                
                ans.push_back(matrix[i][j]);
                i++;
                tag=1;
            
            i--;
            j--;
            while(j>=posj&&tag>=1)
            
                ans.push_back(matrix[i][j]);
                j--;
                tag=2;
            
            j++;
            i--;
           while(i>=posi&&tag>=2)
                ans.push_back(matrix[i][j]);
                i--;
            
            i++;
            
            //i++;
            j++;
            
            posi++;
            posj++;
            s--;
            e--;     
            
            if(s==i||e==j)
                break;
        
        
        return ans;
    
;