const main = arg => {
 const input = arg.trim().split("\n")[0].split(" ").map(num => parseInt(num, 10));
 const A = input[0];
 const B = input[1];
 const C = input[2];
 let result = "No";
 if(A < B && B < C){ result = "Yes"; }

 console.log(result);
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
