function Main(input) {
    input = input.split(' ');
    const a = input.map(x => parseInt(x, 10))

    if (a[0] * 2 + a[1] * 2 >= a[2]) {
        console.log('Yes');
    }
    else {
        console.log('No');
    }
}


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