#include <stdio.h>

const int Mod = 998244353;

int main()
{
	int N, X, Y;
	scanf("%d %d %d", &N, &X, &Y);
	if (X > Y) {
		X ^= Y;
		Y ^= X;
		X ^= Y;
	}
	if (X > 1) X++;
	if (Y < N) Y--;
	if (X > Y) {
		printf("0\n");
		fflush(stdout);
		return 0;
	}
	
	int i, dp[200005] = {};
	for (i = 0, dp[0] = 1; i <= Y - X; i++) {
		if (dp[i] >= Mod) dp[i] -= Mod;
		dp[i+1] += dp[i];
		dp[i+3] += dp[i];
	}
	printf("%d\n", dp[Y-X]);
	fflush(stdout);
	return 0;
}