#include <iostream>
using namespace std;
int main() {
int r1, r2, r3;
cout << "enter r1: ";
cin >> r1;
cout << "enter r2: ";
cin >> r2;
cout << "enter r3: ";
cin >> r3;
if (r2 + r3 <= r1) {
cout << "YES" << endl;
} else {
cout << "NO" << endl;
}
return 0;
}
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