Optimal Page Replacement algorithm if same code example

Example: Optimal Page Replacement Algorithm

Input : Number of frames, fn = 3
        Reference String, pg[] = {1,2,3,4,2,1,5,6,2,1,2,3,7,6,3,2,1,2,3,6};
Output : No. of hits = 11 
         No. of misses = 9

Input : Number of frames, fn = 4 
        Reference String, pg[] = {7, 0, 1, 2, 
                  0, 3, 0, 4, 2, 3, 0, 3, 2};
Output : No. of hits = 7
         No. of misses = 6