#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(ll i=a-1;i>=b;i--)
#define ll long long
#define ull unsigned ll
#define ld long double
#define bl __int128_t
#define fi first
#define se second
#define vel vector<ll>
#define vvel vector<vel>
#define pll pair<ll,ll>
#define vepll vector<pll>
#define vvepll vector<vepll>
#define ves vector<string>
#define vem vector<mint>
#define vvem vector<vem>
#define pmm pair<mint,mint>
#define vepmm vector<pmm>
#define cleout(i) cout<<fixed<<setprecision(i)
template<class T>using PQ=priority_queue<T,vector<T>,greater<T>>;
//               上  右 下 左
vector<int> di={-1, 0, 1, 0};
vector<int> dj={ 0, 1, 0,-1};

vector<int> dx={ 0, 1, 0,-1};
vector<int> dy={ 1, 0,-1, 0};


vector<int> ddx={ 1, 1, 1, 0, -1, -1, -1, 0 };
vector<int> ddy={ 1, 0, -1, -1, -1, 0, 1, 1 };

ll inf=1000000000000000000;//1e18
// LLONG_MAX

mt19937_64 rng((ull)chrono::steady_clock::now().time_since_epoch().count());

//[x^M]1/(1-x)^N=comb(N-1+M,M)

struct mint{
    ll num;
    static ll P;
    static void set_mod(ll MOD){
        P=MOD;
    }
    mint(ll x=0){
        if(x<0){
            x*=-1;
            x%=P;
            x=P-x;
        }
        x%=P;
        num=x;
    }
    mint operator+(const mint &other)const{
        return mint(num+other.num);
    }
    mint operator-(const mint &other)const{
        return mint(num-other.num);
    }
    mint operator*(const mint &other)const{
        return mint(num*other.num);
    }
    mint &operator+=(const mint &other){
        num+=other.num;
        if(num>=P) num-=P;
        return *this;
    }
    mint &operator-=(const mint &other){
        num-=other.num;
        if(num<0) num+=P;
        return *this;
    }
    mint &operator*=(const mint &other){
        num=(num*other.num)%P;
        return *this;
    }
    mint beki(const ll &x)const{
        ll pos=x;
        mint res=1;
        mint now=num;
        while(pos){
            if(pos&1){
                res*=now;
            }
            now*=now;
            pos/=2;
        }
        return res;
    }
    mint inv()const{
        mint res=1;
        mint now=num;
        rep(i,0,30){
            if((P-2)&(1ll<<i)){
                res*=now;
            } 
            now*=now;
        }
        return res;
    }
    mint operator/(const mint &other)const{
        return *this*other.inv();
    }
    mint &operator/=(const mint &other){
        num=(num*other.inv())%P;
        return *this;
    }
    operator ll()const{
        return (ll)(num);
    }
    friend ostream& operator<<(ostream& os, const mint& m){
        os << m.num;
        return os;
    }
    friend istream& operator>>(istream& is,mint& m){
        ll x;
        is>>x;
        m=mint(x);
        return is;
    }
};
ll mint::P=998244353;
//ll mint::P=1000000007;

struct CB{
    vem n,r;
    CB(ll N){//N以下のものをmod INFで返す
        n.assign(N+1,1);
        r.assign(N+1,1);
        rep(i,2,N+1){
            n.at(i)=n.at(i-1)*mint(i);
        }
        r.back()=n.back().inv();
        rrep(i,N,0) r.at(i)=r.at(i+1)*(mint)(i+1);
    }
    mint comb(ll N,ll R){//NCR
        if(N<R) return 0;
        return n.at(N)*r.at(R)*r.at(N-R);
    }
    mint P(ll N,ll R){//NPR
        return n.at(N)*r.at(N-R);
    }
};

CB cb(2.1e6);

void _solve(){
    ll N;
    cin>>N;
    ll H,W;
    cin>>H>>W;
    if(H==1||W==1||(H-W)==0){
        cout<<"Yes\n";
    }else cout<<"No\n";
}



int main(){
    cin.tie(nullptr);
 	ios_base::sync_with_stdio(false);
    
    ll _;
    bool multitest=0;
    if(multitest)cin>>_;
    else _=1;
    rep(__,0,_){
        _solve();
    }
}