function main(input){
    var l = input.split('\n')[1].split(' ').map((n)=>Number.parseInt(n,10));
    var sum = l.reduce((a,b) => a + b );
    var max = Math.max(...l);
    console.log( max < sum-max ? 'Yes' : 'No');
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));
