function Main(input) {
  input = input.split(" ");
  var a = parseInt(input[0], 10);
  var b = parseInt(input[1], 10);
  var c = parseInt(input[2], 10);
  if(a + b - c < 0) {
    console.log("No");
  } else {
    console.log("Yes");
  }
}

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