#include <cstdio>
#define rep(i, d, u) for(int i = d; i <= u; ++i)
int ured() {
	int ch, re = 0;
	do {
		ch = getchar();
	} while(ch < '0' || '9' < ch);
	do {
		re = re * 10 + (ch ^ '0');
	} while('0' <= (ch = getchar()) && ch <= '9');
	return re;
}
void uwit(int da) {
	int ch[21], cn = 0;
	do {
		ch[++cn] = da % 10;
	} while(da /= 10);
	do {
		putchar('0' ^ ch[cn]);
	} while(--cn);
}
int a, b, rans;
int main() {
	a = ured(), b = ured();
	while(a > b) {
		if(a & 1) {
			a = a + 1 >> 1, rans += 2;
		} else {
			a >>= 1, ++rans;
		}
	}
	uwit(rans + b - a), putchar('\n');
	return 0;
}