LeetCode题解之Flipping an Image

 1 vector<vector<int>> flipAndInvertImage(vector<vector<int>>& A) {
 2         for( vector<vector<int>>::iterator it = A.begin() ; it != A.end() ; it++ )
 3         {
 4             for(auto it_b = (*it).begin() ,it_e = (*it).end()-1 ; it_b <= it_e ; it_b++ ,it_e-- )
 5             {
 6                 int tmp = *it_b;
 7                 *it_b = *it_e;
 8                 *it_e = tmp;
 9                 
10                 if( it_b != it_e )
11                 {
12                    *it_b = ( *it_b == 1) ? 0 : 1;
13                    *it_e = ( *it_e == 1) ? 0 : 1;  
14                 }else{
15                     *it_b = ( *it_b == 1) ? 0:1 ;
16                 }
17             }
18         }
19         return A;
20         
21     }