'use strict'
function main(inp) {
  inp = inp.trim().split(' ').map(x => x*1);
  
  let ans = "";
  if(inp[0]*inp[0] + inp[1]*inp[1] >= inp[2]*inp[2]){
	ans = "No";
  } else {
	ans = "Yes";
  }
  console.log(ans);
}

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