Java-Competitive-Programming/Algorithms/BinarySearch.java at master · joney000/Java-Competitive-Programming · GitHub

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import java.util.*;

import java.lang.*;

import java.io.*;

import java.math.*;

/**

* Author : joney_000[developer.jaswant@gmail.com]

* Algorithm : Binary Search

* Time : O(long n) Space : O(1)

* Platform : Codeforces

* Ref : N/A

public class A{

private InputStream inputStream ;

private OutputStream outputStream ;

private FastReader in ;

private PrintWriter out ;

private final int BUFFER = 100005;

private final long mod = 1000000000+7;

private final int INF = Integer.MAX_VALUE;

private final long INF_L = Long.MAX_VALUE / 10;

public A(){}

public A(boolean stdIO)throws FileNotFoundException{

// stdIO = false; // for file io, set from main driver

if(stdIO){

inputStream = System.in;

outputStream = System.out;

}else{

inputStream = new FileInputStream("input.txt");

outputStream = new FileOutputStream("output.txt");

}

in = new FastReader(inputStream);

out = new PrintWriter(outputStream);

}

void run()throws Exception{

int n = i(); int m = i();

long ans = 0;

out.write(""+ans+"\n");

}

long binarySearch(int A[], int n, int key){

int m = 0;

int l = 1; int r = n;

while(l <= r){

m = l + (r-l)/2;

if(A[m] == key){ // first comparison

return m;

}else if( A[m] < key ){ // second comparison

l = m + 1;

}else{

r = m - 1;

}

return -1;

}

void clear(){

}

long gcd(long a, long b){

if(b == 0)return a;

return gcd(b, a % b);

}

long lcm(long a, long b){

if(a == 0 || b == 0)return 0;

return (a * b)/gcd(a, b);

}

long mulMod(long a, long b, long mod){

if(a == 0 || b == 0)return 0;

if(b == 1)return a;

long ans = mulMod(a, b/2, mod);

ans = (ans * 2) % mod;

if(b % 2 == 1)ans = (a + ans)% mod;

return ans;

}

long pow(long a, long b, long mod){

if(b == 0)return 1;

if(b == 1)return a;

long ans = pow(a, b/2, mod);

ans = mulMod(ans, ans, mod);

if(ans >= mod)ans %= mod;

if(b % 2 == 1)ans = mulMod(a, ans, mod);

if(ans >= mod)ans %= mod;

return ans;

}

// 20*20 nCr Pascal Table

long[][] ncrTable(){

long ncr[][] = new long[21][21];

for(int i = 0; i <= 20; i++){

ncr[i][0] = ncr[i][i] = 1L;

}

for(int j = 0; j <= 20; j++){

for(int i = j + 1; i <= 20; i++){

ncr[i][j] = ncr[i-1][j] + ncr[i-1][j-1];

}

return ncr;

}

int i()throws Exception{

return in.nextInt();

}

long l()throws Exception{

return in.nextLong();

}

double d()throws Exception{

return in.nextDouble();

}

char c()throws Exception{

return in.nextCharacter();

}

String s()throws Exception{

return in.nextLine();

}

BigInteger bi()throws Exception{

return in.nextBigInteger();

}

private void closeResources(){

out.flush();

out.close();

return;

}

// IMP: roundoff upto 2 digits

// double roundOff = Math.round(a * 100.0) / 100.0;

// or

// System.out.printf("%.2f", val);

// print upto 2 digits after decimal

// val = ((long)(val * 100.0))/100.0;

public static void main(String[] args) throws java.lang.Exception{

A driver = new A(true);

driver.run();

driver.closeResources();

}

class FastReader{

private boolean finished = false;

private InputStream stream;

private byte[] buf = new byte[4 * 1024];

private int curChar;

private int numChars;

private SpaceCharFilter filter;

public FastReader(InputStream stream){

this.stream = stream;

}

public int read(){

if (numChars == -1){

throw new InputMismatchException ();

}

if (curChar >= numChars){

curChar = 0;

try{

numChars = stream.read (buf);

} catch (IOException e){

throw new InputMismatchException ();

}

if (numChars <= 0){

return -1;

}

return buf[curChar++];

}

public int peek(){

if (numChars == -1){

return -1;

}

if (curChar >= numChars){

curChar = 0;

try{

numChars = stream.read (buf);

} catch (IOException e){

return -1;

}

if (numChars <= 0){

return -1;

}

return buf[curChar];

}

public int nextInt(){

int c = read ();

while (isSpaceChar (c))

c = read ();

int sgn = 1;

if (c == '-'){

sgn = -1;

c = read ();

}

int res = 0;

do{

if(c==','){

c = read();

}

if (c < '0' || c > '9'){

throw new InputMismatchException ();

}

res *= 10;

res += c - '0';

c = read ();

} while (!isSpaceChar (c));

return res * sgn;

}

public long nextLong(){

int c = read ();

while (isSpaceChar (c))

c = read ();

int sgn = 1;

if (c == '-'){

sgn = -1;

c = read ();

}

long res = 0;

do{

if (c < '0' || c > '9'){

throw new InputMismatchException ();

}

res *= 10;

res += c - '0';

c = read ();

} while (!isSpaceChar (c));

return res * sgn;

}

public String nextString(){

int c = read ();

while (isSpaceChar (c))

c = read ();

StringBuilder res = new StringBuilder ();

do{

res.appendCodePoint (c);

c = read ();

} while (!isSpaceChar (c));

return res.toString ();

}

public boolean isSpaceChar(int c){

if (filter != null){

return filter.isSpaceChar (c);

}

return isWhitespace (c);

}

public static boolean isWhitespace(int c){

return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;

}

private String readLine0(){

StringBuilder buf = new StringBuilder ();

int c = read ();

while (c != '\n' && c != -1){

if (c != '\r'){

buf.appendCodePoint (c);

}

c = read ();

}

return buf.toString ();

}

public String nextLine(){

String s = readLine0 ();

while (s.trim ().length () == 0)

s = readLine0 ();

return s;

}

public String nextLine(boolean ignoreEmptyLines){

if (ignoreEmptyLines){

return nextLine ();

}else{

return readLine0 ();

}

public BigInteger nextBigInteger(){

try{

return new BigInteger (nextString ());

} catch (NumberFormatException e){

throw new InputMismatchException ();

}

public char nextCharacter(){

int c = read ();

while (isSpaceChar (c))

c = read ();

return (char) c;

}

public double nextDouble(){

int c = read ();

while (isSpaceChar (c))

c = read ();

int sgn = 1;

if (c == '-'){

sgn = -1;

c = read ();

}

double res = 0;

while (!isSpaceChar (c) && c != '.'){

if (c == 'e' || c == 'E'){

return res * Math.pow (10, nextInt ());

}

if (c < '0' || c > '9'){

throw new InputMismatchException ();

}

res *= 10;

res += c - '0';

c = read ();

}

if (c == '.'){

c = read ();

double m = 1;

while (!isSpaceChar (c)){

if (c == 'e' || c == 'E'){

return res * Math.pow (10, nextInt ());

}

if (c < '0' || c > '9'){

throw new InputMismatchException ();

}

m /= 10;

res += (c - '0') * m;

c = read ();

}

return res * sgn;

}

public boolean isExhausted(){

int value;

while (isSpaceChar (value = peek ()) && value != -1)

read ();

return value == -1;

}

public String next(){

return nextString ();

}

public SpaceCharFilter getFilter(){

return filter;

}

public void setFilter(SpaceCharFilter filter){

this.filter = filter;

}

public interface SpaceCharFilter{

public boolean isSpaceChar(int ch);

}

class Pair implements Comparable<Pair>{

public int a;

public int b;

public Pair(){

this.a = 0;

this.b = 0;

}

public Pair(int a,int b){

this.a = a;

this.b = b;

}

public int compareTo(Pair p){

if(this.a == p.a){

return this.b - p.b;

}

return this.a - p.a;

}

@Override

public String toString(){

return "a = " + this.a + " b = " + this.b;

}

Java-Competitive-Programming/Algorithms/BinarySearch.java at master · joney000/Java-Competitive-Programming · GitHub

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