//acmp.ru 0597 nezemniye.cpp 10%

#include <stdio.h>

int main(){
	freopen("INPUT.TXT", "r", stdin);
	freopen("OUTPUT.TXT", "w", stdout);

	int r1, r2, r3;
	scanf("%i %i %i", &r1, &r2, &r3);
	if(r1 >= r2+r3){
		printf("YES");
	}else{
		printf("NO");
	}
}