#include <stdio.h>
#define FIGURE 7

int main(void)
{
	int test[10]={1,2,3,4,5,6,7,8,9,10};
	int number=sizeof(test)/sizeof(int);
	int min=0;
	int max=number-1
	int mid;

	while(min<=max){
		mid=(min+max)/2;
		if(test[mid]==FIGURE){
			printf("?????????????????????\n");
			return 0;
		}else if(test[mid]<FIGURE){
			min=mid+1;
		}else if(test[mid]>FIGURE){
			max=mid-1;
		}
	}

	printf("???????????????????????§??????\n");
	return 0;
}