#include<stdio.h>
int main()
{
	int t, i;
	long long int N, n, k, j;
	scanf("%d", &t);
	for (i = 0; i < t; i++)
	{
		scanf("%lld", &N);
		n = N + 1;
		for (j = 1; j <= n; j *= 10);
		k = j - n;
		printf("%lld\n", k);
	}
	return 0;
}