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- #include<bits/stdc++.h>
- using namespace std;
- int main(){
- int t;
- cin>>t;
- while(t--){
- int n,count=0,k=0;
- cin>>n;
- int a[n],b[n];
- for(int i=0;i<n;i++)cin>>a[i];
- for(int i=0;i<n;i++)cin>>b[i];
- for(int i=0;i<n;i++){
- if(a[i]>b[k++]){
- count++;
- i--;
- }
- if(k>n-1)break;
- }
- cout<<count<<endl;
- }}
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