! yukicoder My Practice
! author: Leonardone @ NEETSDKASU
 
      PROGRAM yukicoder
          INTEGER :: n, a(100000), ans, mx, ai
          
          READ(*,*) n
          READ(*,*) a(1:n)
          
          mx = a(1)
          ans = 0
          
          DO i = 2, n
              ai = a(i)
              IF (ai > mx) THEN
                  mx = ai
              ELSE
                  IF (ai > ans) ans = ai
              END IF
          END DO
          
          PRINT '(I0)', ans
 
          STOP
      END PROGRAM yukicoder