#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define REP(i,n) for (int i = 1; i < (int)(n); i++)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define debug(var) do{cout << #var << " : "; view(var);}while(0)
template<class T> bool chmin(T &a, T b) {if(a>b) {a=b;return 1;}return 0;}
template<class T> bool chmax(T &a, T b) {if(a<b) {a=b;return 1;}return 0;}
using namespace std;
template<class T> void view(T e) {cout << e << endl;}
template<class T> void view(const vector<T> &v) {for(const auto &e : v){cout << e << " ";} cout << endl;}
template<class T> void view(const vector<vector<T>> &vv) {for(const auto &v : vv){view(v);}}
using vint = vector<int>;
using vvint = vector<vector<int>>;
using ll = long long;
using vll = vector<ll>;
using vvll = vector<vector<ll>>;
using P = pair<int,int>;
const int inf = 1e9;
const ll inf_l = 1e18;
const int MAX = 1e5;

int main() {
    int a, b, c; cin >> a >> b >> c;
    if (a > b) swap(a,b);
    if (a < c && c < b) cout << "Yes" << endl;
    else cout << "No" << endl;
}
#include <stdio.h>

int main() {

	int a, b;
	scanf("%d %d", &a, &b);
	char s[a+b+2];
	scanf("%s", s);
	
	for(int i=0; i<a; i++){
		if(s[i]<48 || s[i]>57){
			printf("No\n");
			return 0;
		}
	}
	
	if (s[a]!=45){
		printf("No\n");
			return 0;
	}
	
	for(int i=a+1; i<=(a+b); i++){
		if(s[i]<48 || s[i]>57){
			printf("No\n");
			return 0;
		}
	}

	printf("Yes\n");

    return 0;
}