function main(input){
    let numarray=input.split(' ').map(Number);
    let a,b,c;
    a=numarray[0];
    b=numarray[1];
    c=numarray[2];
    if (a<b && b<c){
        console.log('Yes');
    }else{
        console.log('No');
    }
}
main(require("fs").readFileSync("/dev/stdin","utf8"));
