询问求解答

#include <iostream>
#define big long long
using namespace std;
big T,n,a[100005],suml,sumr;
int main()
{
    // freopen("war5.in","r",stdin);
    // freopen("war.out","w",stdout);
    scanf("%lld",&T);
    while(T--)
    {
        suml = sumr = 0;
        scanf("%lld",&n);
        for(big i = 1;i <= n;i++)
        {
            scanf("%lld",a+i);
            sumr += a[i];
        }
        for(big i = 1;i < n;i++)
        {
            suml += a[i]; sumr -= a[i];
			//---------------------------------
			if(a[i]>a[i+1] && a[i]+a[i+1]>a[i+2])
			{
				printf("%d",suml+a[i+1]>sumr-a[i+1]);
			}
            else printf("%d",suml>sumr);
        }
        printf("\n");
    }
    return 0;
}