function Main(inp) {
    var input = inp.split('\n');
    input = input[0].split(' ').map(function(n) { return Number(n) });
    var a = input[0];
    var b = input[1];
    var c = input[2];
    if (Math.sqrt(a) + Math.sqrt(b) < Math.sqrt(c)) {
        console.log('Yes');
    } else {
        console.log('No');
    }
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));
