// Level 1 - Contest 2 - Question 3 - Solution 1.
#include <iostream>
using namespace std;
int main()
{
int A = 0;
int B = 0;
int C = 0;
cin >> A >> B >> C;
if(A + B >= C)
cout << "Yes" << endl;
else
cout << "No" << endl;
return 0;
}
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