process.stdin.resume();
process.stdin.setEncoding('utf8');

var input_lines = []; 
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', (line) => {
  input_lines.push(line);
});
reader.on('close', () => {
  var a = Math.sqrt(Number(input_lines[0].split(' ')[0]));
  var b = Math.sqrt(Number(input_lines[0].split(' ')[1]));
  var c = Math.sqrt(Number(input_lines[0].split(' ')[2]));

  if(a + b < c){
    console.log('Yes');
  }else{
    console.log('No');
  }
});