求DALAO看一看

#include<iostream>
#include<cstring>
#include<cstdio>
#include<cmath>
#include<algorithm>
using namespace std;
int school,student,start=0;
int range_score[1000010],answer=0;
int school_score[1000010];
int main(){
	cin>>school>>student;
	for(int i=0;i<school;i++){cin>>school_score[i];}
	for(int i=0;i<student;i++){cin>>range_score[i];}
	sort(range_score,range_score+student);
	sort(school_score,school_score+school);
	for(int i=0;i<student;i++){
		for(int j=start;j<school;j++){
			if(school_score[j]>range_score[i]){
				if(range_score[i]-school_score[j-1]>=school_score[j]-range_score[i]){
					answer+=school_score[j]-range_score[i];
					start=school_score[j];
				}else{
					answer+=range_score[i]-school_score[j-1];
					start=school_score[j-1];
				}
				break;
			}
		}
	}
	cout<<answer;
	return 0;
}

急，在线等！！！！！！ ！！！！！！！！！！！！！ ！！！！！！