//ALEX ENACHE

#include <vector>
#include <algorithm>
#include <queue>
#include <map>
#include <set>
#include <unordered_map>
#include <time.h>
#include <iomanip>
#include <deque>
#include <math.h>
#include <assert.h>
#include <stack>
#include <bitset>
#include <random>

using namespace std;

//-----------------------------------------------------------------

#include <fstream>

//ifstream cin("input"); ofstream cout("output");
ifstream cin("inversmodular.in"); ofstream cout("inversmodular.out");

long long lgput(long long a, long long b, long long MOD) {
	long long ret = 1LL;
	while (b) {
		if (b & 1LL) ret = (ret * a) % MOD;
		a = (a * a) % MOD;
		b >>= 1LL;
	}

	return (ret % MOD);
}

long long inv_mod(long long x, long long MOD) {
	return lgput(x, MOD - 2, MOD);
}

int main() {

	long long a, b;
	cin >> a >> b;
	cout << inv_mod(a , b);

	return 0;
}