function main(input) {
  var rows = input.split('\n');
  var sideCount = ~~rows[0];
  var sides = rows[1].trim().split(" ").map(Number);
  var maxLength = Math.max(...sides);
  var othersLengthSum = sides.reduce((prev, cur) => prev + cur, 0);
  if ( 2 * maxLength < othersLengthSum ) {
  	console.log('Yes')
  }else {
  	console.log('No')
  }
}
 
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
