function main(input){
    let numArray = [];
    let strArray = input.split(' ');
    for(let i = 0; i<strArray.length; i++){
        numArray.push(parseInt(strArray[i]));
    }
    if(numArray[0] < numArray[1] && numArray[1] < numArray[2]){
        console.log('Yes');
    }else {
            console.log('No');
        }
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));
