#include <stdio.h>
int main(){
	int a[10000][2],t,i;
	scanf("%d", &t);
	for (int i = 0; i<t;i++){
	    for (int j = 0; j<2; j++){
	        scanf("%d", &a[i][j]);
	    }
	}
	i=0;
	while (i < t){
		if (a[i][0] == a[i][1]){
			printf("0\n");
		}
		else {
			if ((a[i][0] % 2) == (a[i][1] % 2)){
				if (a[i][0] > a[i][1]){printf("1\n");}
				else {printf("2\n");}
			}
			else {
				if (a[i][0]>a[i][1]){printf("2\n");}
				else {printf("1\n");}
			}
		}
		i++;
	}
	return 0;
}