CE求原因

#include <bits/stdc++.h>
using namespace std;
struct h{
	int f,b;
	int x;
}a[1000010],f[1000010],b[1000010];
int vis[1000010];
int fcmp(h x,h y){
	return x.f>y.f;
}
int bcmp(h x,h y){
	return x.b>y.b;
}
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	int n;
	cin>>n;
	for (int i=1;i<=2*n;i++){
		cin>>a[i].f;
		a[i].x=i;
	}
	for (int i=1;i<=2*n;i++){
		cin>>a[i].b;
	}
	sort(a+1,a+2*n+1,fcmp);
	for (int i=1;i<=2*n;i++){
		f[i]=a[i];
	}
	sort(a+1,a+2*n+1,bcmp);
	for (int i=1;i<=2*n;i++){
		b[i]=a[i];
	}
	long long mf=0,mb=0,sf=0,sb=0;
	int fl=1,fr=2*n,bl=1,br=2*n;
	int q;
	for (int i=1;i<=n;i++){
		cin>>q;
		if (q==1){
			while (vis[f[fl].x]){
				fl++;
			}
			while (vis[f[fr].x]){
				fr--;
			}
			vis[f[fl].x]=1;
			vis[f[fr].x]=1;
			mf+=f[fl].f;
			mb+=f[fl].b;
			sf+=f[fr].f;
			sb+=f[fr].b;
		}
		else{
			while (vis[b[bl].x]){
				bl++;
			}
			while (vis[b[br].x]){
				br--;
			}
			vis[b[bl].x]=1;
			vis[b[br].x]=1;
			mf+=b[bl].f;
			mb+=b[bl].b;
			sf+=b[br].f;
			sb+=b[br].b;
		}
	}
	cout<<mf<<" "<<mb<<"\n"<<sf<<" "<<sb;
	return 0;
}