#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,x,y; cin>>a; cin>>x; cin>>y; if(x>a,a<y){ cout<<"YES"; } if(x<a,a>y){ cout<<"NO"; } return 0; }