function main(input){
    var S=input.split("\n")[0].split(" ");
    var a=S[0];
    var b=S[1];
    var c=S[2];
    //console.log(S);
    //console.log(a);
    //console.log(b);
    //console.log(c);
    if((c=="="&&a==b)||(c=="<"&&a<b)||(c==">"&&a>b)){
        console.log("YES");
    }else{
        console.log("NO");
    }
    return;
}

main(require("fs").readFileSync("/dev/stdin", "utf8"));