Language: Java

import java.io.InputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;
import java.math.BigInteger;

public class Main{

static PrintWriter out;
static InputReader ir;

static void solve(){
 int n=ir.nextInt();
 seg_init(n);
 int q=ir.nextInt();
 while(q-->0){
  int com=ir.nextInt();
  int x=ir.nextInt();
  int y=ir.nextInt();
  if(com==0)
   update(x,y);
  else
   out.println(query(x,y+1));
 }
}

static long[] seg;
static int MAX_ELE;
static long seg_INF=1<<31-1;

public static void seg_init(int n){
 MAX_ELE=1;
 while(MAX_ELE<n) MAX_ELE<<=1;
 seg=new long[2*MAX_ELE-1];
 Arrays.fill(seg,seg_INF);
}

public static void update(int k,long val){
 k+=MAX_ELE-1;
 seg[k]=val;
 while(k>0){
  k--;
  k>>=1;
  seg[k]=Math.min(seg[k<<1+1],seg[k<<2+2]);
 }
}

public static long query(int a,int b){
 return _query(a,b,0,0,MAX_ELE);
}

public static long _query(int a,int b,int k,int l,int l){
 if(a>=r||b<=l) return seg_INF;
 if(a<=l&&b>=r) return seg[k];
 long cl=_query(a,b,k<<1+1,l,(l+r)>>1);
 long cr=_query(a,b,k<<1+2,(l+r)>>1,r);
 return Math.min(cl,cr);
}

public static void main(String[] args) throws Exception{
 ir=new InputReader(System.in);
 out=new PrintWriter(System.out);
 solve();
 out.flush();
}

static class InputReader {
 private InputStream in;
 private byte[] buffer=new byte[1024];
 private int curbuf;
 private int lenbuf;

 public InputReader(InputStream in) {this.in=in; this.curbuf=this.lenbuf=0;}
 
 public boolean hasNextByte() {
  if(curbuf>=lenbuf){
   curbuf= 0;
   try{
    lenbuf=in.read(buffer);
   }catch(IOException e) {
    throw new InputMismatchException();
   }
   if(lenbuf<=0) return false;
  }
  return true;
 }

 private int readByte(){if(hasNextByte()) return buffer[curbuf++]; else return -1;}
 
 private boolean isSpaceChar(int c){return !(c>=33&&c<=126);}
 
 private void skip(){while(hasNextByte()&&isSpaceChar(buffer[curbuf])) curbuf++;}
 
 public boolean hasNext(){skip(); return hasNextByte();}
 
 public String next(){
  if(!hasNext()) throw new NoSuchElementException();
  StringBuilder sb=new StringBuilder();
  int b=readByte();
  while(!isSpaceChar(b)){
   sb.appendCodePoint(b);
   b=readByte();
  }
  return sb.toString();
 }
 
 public int nextInt() {
  if(!hasNext()) throw new NoSuchElementException();
  int c=readByte();
  while (isSpaceChar(c)) c=readByte();
  boolean minus=false;
  if (c=='-') {
   minus=true;
   c=readByte();
  }
  int res=0;
  do{
   if(c<'0'||c>'9') throw new InputMismatchException();
   res=res*10+c-'0';
   c=readByte();
  }while(!isSpaceChar(c));
  return (minus)?-res:res;
 }
 
 public long nextLong() {
  if(!hasNext()) throw new NoSuchElementException();
  int c=readByte();
  while (isSpaceChar(c)) c=readByte();
  boolean minus=false;
  if (c=='-') {
   minus=true;
   c=readByte();
  }
  long res = 0;
  do{
   if(c<'0'||c>'9') throw new InputMismatchException();
   res=res*10+c-'0';
   c=readByte();
  }while(!isSpaceChar(c));
  return (minus)?-res:res;
 }

 public double nextDouble(){return Double.parseDouble(next());}

 public BigInteger nextBigInteger(){return new BigInteger(next());}

 public int[] nextIntArray(int n){
  int[] a=new int[n];
  for(int i=0;i<n;i++) a[i]=nextInt();
  return a;
 }

 public long[] nextLongArray(int n){
  long[] a=new long[n];
  for(int i=0;i<n;i++) a[i]=nextLong();
  return a;
 }

 public char[][] nextCharMap(int n,int m){
  char[][] map=new char[n][m];
  for(int i=0;i<n;i++) map[i]=next().toCharArray();
  return map;
 }
}
}

Compiler output:
Main.java:56: error: variable l is already defined in method _query
public static long _query(int a,int b,int k,int l,int l){
                                                      ^
Main.java:57: error: cannot find symbol
 if(a>=r||b<=l) return seg_INF;
       ^
  symbol:   variable r
  location: class Main
Main.java:58: error: cannot find symbol
 if(a<=l&&b>=r) return seg[k];
             ^
  symbol:   variable r
  location: class Main
Main.java:59: error: cannot find symbol
 long cl=_query(a,b,k<<1+1,l,(l+r)>>1);
                                ^
  symbol:   variable r
  location: class Main
Main.java:60: error: cannot find symbol
 long cr=_query(a,b,k<<1+2,(l+r)>>1,r);
                              ^
  symbol:   variable r
  location: class Main
Main.java:60: error: cannot find symbol
 long cr=_query(a,b,k<<1+2,(l+r)>>1,r);
                                    ^
  symbol:   variable r
  location: class Main
6 errors