function Main(input) {
    // 1行目がinput[0], 2行目がinput[1], …に入る
    var nums = input.split(' ').map((n) => parseInt(n, 10));
    var a = nums[0];
    var b = nums[1];
    var c = nums[2];

    var left = Math.sqrt(a) + Math.sqrt(b);
    var right = Math.sqrt(c);
    if (left < right) {
        console.log("Yes");   
    } else {
        console.log("No");
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));