# 2015/10/11
# WA 13/20
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
    if (x % 100) > 0 then
      x.upto(x1*100+99){|i| min_ = ar[i]  if min_ > ar[i] }
      (x1+1).upto(y1){|i| min_ = ar2[i] if min_ > ar2[i]  }
    else
      x1.upto(y1){|i| min_ = ar2[i] if min_ > ar2[i]      }
    end
    (y1*100).upto(y){|i|
      min_ = ar[i] if min_ > ar[i]
    } if (y % 100)>0
  end
  puts min_
end
}