写的像shi一样 纯娱乐 求调

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

int a[5],b[5][25],s[5],ans,q,x,y;
int main(){
    for(int i=1;i<=4;i++)
    {
		cin>>a[i];
	}
	for(int i=1;i<=4;i++)
	{
		for(int j=1;j<=a[i];j++)
		{
			cin>>b[i][j];
		}
		x=b[i][1];y=b[i][2];
		int u=3;
		a[i]-=2;
		if(x==y&&a[i]-u==2)
		{
			s[i]+=x+y;
			x=b[i][u];
			u++;
			y=b[i][u];
			u++;
		}
		else
		{
			s[i]+=b[i][u];
		}
		while(u<a[i])
		{
			if(x>y)
			{
				x-=y;
				s[i]+=y;
				y=b[i][u];
				u++;
			}
			else if(y>x)
			{
				y-=x;
				s[i]+=x;
				x=b[i][u];
				u++;
			}
			else if(x==y&&a[i]-u>=2)
			{
				s[i]+=x+y;
				x=b[i][u];
				u++;
				y=b[i][u];
				u++;
			}
			else
			{
				s[i]+=b[i][u];
			}
		}
	}
	for(int i=1;i<=4;i++)
    {
		ans+=s[i];
	}
	cout<<ans;
    return 0;
}