#include <iostream>

using namespace std;
//変数デバッグ
#define DEB(variable) cout << #variable << '=' << variable << endl

//for簡易表記(引数ミス防止)
#define FOR(LoopVariable,numberOFbegin,numberOFend) for (int LoopVariable = (numberOFbegin); (LoopVariable) < (numberOFend); (LoopVariable)++)
#define REP(LoopVariable,numberOFend) for(int LoopVariable = 0;(LoopVariable)<(numberOFend);LoopVariable++)

int main(){

    int n, m, x;
    cin >> n >> m >> x;

    if(x-(n-m)>=3){
        cout << "YES"<<endl;
    }else{
        cout << "NO" << endl;
    }

    return 0;
}