checker:

#include "testlib.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> a,b;
bool v[100005];
int n=100000;
int main(int argc, char* argv[]){
    setName("Chicken");
    registerInteraction(argc, argv);
	registerGen(argc, argv,1);
    cout<<n<<endl;
    for(int i=0;i<n;i++){
    	int l1=rnd.next(1,1000000000); 
    	a.push_back(l1);
    	cout<<l1<<" ";
	}
	cout<<endl;
	for(int i=0;i<n;i++){
		int l1=rnd.next(1,1000000000); 
    	b.push_back(l1);
    	cout<<l1<<" ";
	}
    int pa = ouf.readInt();
    int ans=0;
	for(int i=0;i<n;i++){
    	int l=(lower_bound(a.begin(),a.end(),b[i])-a.begin());
//    	cout<<l<<endl;
    	while(v[l]==1&&l<n)l++;
    	if(l<n){
    		v[l]=1;
    		ans++;
		}else break;
	}
    if (pa!=ans) quitf(_wa, "yinweiniSHAN!!!!");
    else quitf(_ok, "orz");
}

交互库：

#include<bits/stdc++.h> 
using namespace std;
int n;


extern "C" {
    extern int p(int n,vector<int> a,vector<int> b);
}

int main() {
	vector<int> a,b;
	a.clear();
	b.clear(); 
	cin>>n;
	for(int i=0;i<n;i++){
		int k;
		cin>>k;
		a.push_back(k);
	}
	for(int i=0;i<n;i++){
		int k;
		cin>>k;
		b.push_back(k);
	} 
    cout << p(n,a,b) <<endl;
    return 0;
}