import std.stdio, std.algorithm, std.string, std.conv, std.array, std.range, std.math, core.stdc.stdio;
int readint() { return readln.chomp.to!int; }
int[] readints() { return readln.split.to!(int[]); }


void main() {
    int a,b,c;
    scanf("%d%d%d", &a,&b,&c);
    writeln(a+b >= c ? "Yes" : "No");
    auto _ = readln(); // dbg
}