Topic description
Enter a matrix and print each number in clockwise order from the outside to the inside. For example, if you enter the following matrix: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Then print the number 1 in turn, 2,3,4,8,12,16,15,14,13,9,5,6,7,11,10.
class Solution {
public:
vector<int> printMatrix(vector<vector<int> > matrix) {
vector<int>vt;
int row = matrix.size();
int col = matrix[0].size();
int ri=0,rj=row-1,ci=0,cj=col-1,i=0,j=0;
while(ci<=cj&&ri<=rj){
for(j=ci;j<=cj;j++){
vt.push_back(matrix[ri][j]);
}
ri++;
if(ci>cj||ri>rj)break;
for(i=ri;i<=rj;i++){
vt.push_back(matrix[i][cj]);
}
cj--;
if(ci>cj||ri>rj)break;
for(j=cj;j>=ci;j--){
vt.push_back(matrix[rj][j]);
}
rj--;
if(ci>cj||ri>rj)break;
for(i=rj;i>=ri;i--){
vt.push_back(matrix[i][ci]);
}
ci ++;
}
return vt;
}
};