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Main1965_bs.java
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Main1965_bs.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
public class Main1965_bs {
public static void main(String[] args) throws NumberFormatException, IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int N = Integer.parseInt(br.readLine());
StringTokenizer st = new StringTokenizer(br.readLine());
int[] arr = new int[N];
int size = 0;
for(int i=0;i<N;i++) {
int n = Integer.parseInt(st.nextToken());
if(size == 0) {
arr[0]=n;
size++;
}else if(arr[size-1]<n){
arr[size++] = n;
}else {
search(arr,size,n);
}
}
System.out.println(size);
}
static void search(int[] arr, int size, int n) {
int f = 0;
int e = size-1;
while(f<=e) {
int mid = (f+e)/2;
if(arr[mid]<n) {
f= mid+1;
}else if(arr[mid]==n){
return;
}else {
e= mid-1;
}
}
arr[f] = n;
}
}