C :

#include<stdio.h>
int main()
{
	int t,n,m;
	scanf("%d",&t);
	for(int i=0;i<t;i++)
	{scanf("%d %d",&n,&m);
	if(n==1&&m==1) printf("0\n");
	else if(n==1||m==1) printf("1\n");
	else printf("2\n");
	}
	return 0;
}

C++ :

#include<stdio.h>

int main()
{
	int t;
	scanf("%d",&t);
	int n,m;
	while(t--)
	{
		scanf("%d%d",&n,&m);
		if(n == 1 && m == 1)
			printf("0\n");
		else if(n == 1 || m == 1)
			printf("1\n");
		else
			printf("2\n");
	}
	return 0;
}