#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> /// strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; cout<<((a+b>c)?"Yes":"NO")<<endl; return 0; }