#input
a = [7,4,5,3,9,7,2]
#main
b = []
for i in range (0,len(a)):  #複製陣列，不能直接用=    （=為參考）
  b.append(a[i])
b.sort()        #排序
K = 1           #判斷為第幾的數字
Q = 0           #此數字所在的index
for i in range (1,len (b)):     #判斷
  if b[i] != b [i-1]:
    K += 1
  if K == 5:
    print(b[i])
    Q = i
    break

c = []          #儲存a存有此數字的index
for i in range (0,len(a)):
  if a[i] == b[Q]:
    c.append(i)
print (c)