RotateMatrix

#include <bits/stdc++.h>

void rotateMatrix(vector<vector<int>> &nums, int n, int m)
{
    // Write your code here
    int x=nums[0][m-1];
     if(n>1)
     x=nums[1][0];
     int y;
     int top=0,left=0,right=m-1,bottom=n-1;
     while(top<bottom && left<right)
     {
         for(int i=left;i<=right;i++)
         {
             y=nums[top][i];
             nums[top][i]=x;
             x=y;
         }
         top++;
         for(int i=top;i<=bottom;i++)
         {
             y=nums[i][right];
             nums[i][right]=x;
             x=y;
         }
         right--;
          if(top<=bottom && right>=left)
          {
              for(int i=right;i>=left;i--)
              {
                  y=nums[bottom][i];
                  nums[bottom][i]=x;
                  x=y;
              }
              bottom--;
          }
          if(left<=right && top<=bottom)
          {
              for(int i=bottom ;i>=top;i--)
              {
                  y=nums[i][left];
                  nums[i][left]=x;
                  x=y;
              }
              left++;
          }
          if(top<bottom)
          {
              x=nums[top+1][left];
          }
     }
   
   
}