Number of platfroms.cpp

#include<bits/stdc++.h>
using namespace std;
int main(){
	//code
	int t;
	cin>>t;
	while(t--){
	    int n;
	    cin>>n;
	    int A[n];
	    int B[n];
	    for(int i=0;i<n;i++){
	        cin>>A[i];
	    }
	    for(int i=0;i<n;i++){
	        cin>>B[i];
	    }
	    sort(A,A+n);
	    sort(B,B+n);
	    
	    int i=1;
	    int j=0;
	    int total=1;
	    int count=1;
	    while(i<n && j<n){
	        if(A[i]<=B[j]){
	            count++;
	            i++;
	            if(total<count){
	                total=count;
	            }
	        }
	        else {
	            count--;
	            j++;
	        }
	    }
	    
	    cout<<total<<endl;
	    
	
	}
	return 0;
}