"use strict";

var print = function print(x) {
  return console.log(x);
};

var readline = require('readline');

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout,
  terminal: false
});
var A, B, C;

function solve(A, B, C) {
  if (A + B >= C) return true;
  return false;
}

rl.on('line', function (line) {
  var ret = line.split(' ');
  A = parseInt(ret[0]);
  B = parseInt(ret[1]);
  C = parseInt(ret[2]);

  if (solve(A, B, C)) {
    print('Yes');
  } else {
    print('No');
  }
});
