#include<bits/stdc++.h>
#define ll long long
using namespace std;
int n, k;
ll ans;
int main()
{
    //freopen("in.txt", "r", stdin);
    //freopen("out.txt","w",stdout);
    scanf("%d%d%d",&a,&b,&c);
    if(a + b >= c) printf("Yes\n");
    else printf("No\n");
    return 0;
}
