#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; a=a+b; if(a>c){ cout<<"Yes"<<endl; } else{ cout<<"No"<<endl; } return 0; }