s=STDIN.gets.split
n = s[0].to_i
q = s[1].to_i
int_max=2**31-1
ar  = Array.new(100001,(int_max))
ar2 = Array.new(1001  ,(int_max))

1.upto(q) {
s=STDIN.gets.split
com = s[0].to_i
x   = s[1].to_i
y   = s[2].to_i
#printf(":%d %d %d\n",com,x,y)
if(com==0)
  ar[x]=y
  ar2[x/100]=y if ar2[x/100] > y
elsif (com==1)
  min_=int_max
  x1=x/100
  y1=y/100
  #printf("x1y1=%d %d\n",x1,y1)
  if(x1==y1)
    x.upto(y){|i|
      min_ = ar[i] if min_ > ar[i]
    }
  else
    x1+=1 if (x % 100)>0
    x.upto(x1*100-1){|i|
      min_ = ar[i] if min_ > ar[i]
    }
    x1.upto(y1){|i|
      min_ = ar2[i] if min_ > ar2[i]
    }
    (y1*100).upto(y){|i|
      min_ = ar[i] if min_ > ar[i]
    }
  end
  puts min_
end
}