#include<stdio.h>
#include<string.h>
int main()
{
	int total,min,max,nilai,count,kasus;

	FILE *fp=fopen("random.txt","r");
	fscanf(fp,"%d\n",&kasus);
	for(int i=0;i<kasus;i++)
	{
		nilai=1;
		count=0;
		fscanf(fp,"%d %d %d\n",&total,&min,&max);
		char string[total];
		fscanf(fp,"%s\n",string);
		for(int j=0;j<strlen(string-1);j++)
		{
			if(string[j]=='1'&&string[j+1]=='1')
			{
				nilai++;

					if(nilai>max)
					{
						nilai=1;

					}
					else if(nilai>=min && nilai<=max)
					{
						if(string[j+1]=='1'&&string[j+2]=='0')
						{
							count++;
							nilai=1;
						}
						else if(string[j+1]=='1'&&string[j+2]=='\0')
						{
							count++;
							nilai=1;
						}

					}

			}
			else if(string[j]=='1'&&string[j+1]=='0')
			{
				nilai=1;
			}

		}
		printf("%d\n",count);

	}
}