#import <stdio.h>

int cifSuc(int x) {
	int ret = 0;

	while (x > 0) {
		ret += (x % 10);
		x = (x / 10);
	}

	return ret;
}

int main() {
	int N;
	int m;
	
	while (1) {
		N = 0;
		m = 1;

		scanf("%d", &N);
		
		if (N < 1) return 0;

		for (;;) {
			if (cifSuc(N - m) == cifSuc(N) - 1) {
				printf("%d\n", N - m);
				break;
			}
			
			m *= 10;
		}
	}


	return 0;
}