/*
fraction.cpp
Standard IO
*/
#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#define ll long long
#define db double

using namespace std;
const db eps=1e-6;
const int inf=0x3f3f3f3f;
const ll lnf=1e18;
ll read() {
	ll o=0,w=1;char c=getchar();
	while(c<'0'||c>'9') {if(c=='-') w=-1;c=getchar();}
	while(c>='0'&&c<='9') {o=o*10+c-'0';c=getchar();}
	return o*w;
}

namespace dada {

const int N=3e7+10;
int n,m;
bool vis[8010][8010];
int cnt;
void dfs(int x,int y,bool fl) {
	// if(x<=0||y<=0) return;
	// if(x<y*2&&x*2>y) return;
	if(x>n||y>m) return;
	if(vis[x][y]) return;
	vis[x][y]=1;
	cnt++;
	if(!fl) dfs(y,x,1);
	dfs(x+y*2,y,0);
	// dfs(x-y*2,y,0);
}
int Main() {
	n=read(),m=read();
	dfs(1,2,0);
	cout<<cnt<<"\n";
	// for(int i=1;i<=m;i++) {
	// 	for(int j=1;j<=n;j++) {
	// 		if(vis[j][i]) fprintf(stderr,"%d/%d ",j,i);
	// 	}
	// 	cerr<<"\n";
	// }
	return 0;
}






}

int main() {
	// freopen("fraction.in","r",stdin);
	// freopen("fraction.out","w",stdout);
	int T=1;
	while(T--) {dada::Main();}
	return 0;
}

/*
cd fraction
g++ fraction.cpp -o fraction -std=c++14 -Wall -O2 -static -lm "-Wl,-stack=512000000"
./fraction
copy ex_1.in fraction.in
fc.exe fraction.out ex_1.ans /n /lb 1 /a
*/