#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() { long long a,b,c; cin>>a>>b>>c; if(b <= a){ if(a<=c){ if(b<c){ cout<<"yes"; } } } else{ cout<<"no"; } return 0; }