#define _USE_MATH_DEFIMES
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cctype>
#include <climits>
#include <clocale>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <regex>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

const int MOD = 1'000'000'007;
const int MOD2 = 998'244'353;
const int INF = 1'000'000'000; //1e9
const int NIL = -1;
const long long LINF = 1'000'000'000'000'000'000; // 1e18
const long double EPS = 1E-10;

template<class T, class S> inline bool chmax(T &a, const S &b){
    if(a < b){
        a = b; return true;
    }
    return false;
}
template<class T, class S> inline bool chmin(T &a, const S &b){
    if(b < a){
        a = b; return true;
    }
    return false;
}

template<class T, class S> inline bool exist(std::set<T> &s, const S &e){
    return (s.find(e) != s.end());
}








template<unsigned long long m> class comb_perm{
private:
    int n;
    std::vector<long long> fact, fact_inv;
public:
    comb_perm(): n(0), fact(1), fact_inv(1){
        fact[0] = fact_inv[0] = 1;
    }
    comb_perm(int N): n(N), fact(N+1), fact_inv(N+1){
        fact[0] = fact[1] = fact_inv[0] = fact_inv[1] = 1;
        for(int i{2}; i <= n; ++i) fact[i] = fact[i - 1] * i % m;
        for(int i{2}; i <= n; ++i) fact_inv[i] = inv(fact[i]);
    }
 
    bool resize(int N){
        if(N <= n) return false;
        fact.resize(N+1);
        fact_inv.resize(N+1);
        if(!n && N){
            fact[1] = fact_inv[1] = 1;
        }
        for(int i{std::max(2, n+1)}; i <= N; ++i) fact[i] = fact[i - 1] * i % m;
        for(int i{std::max(2, n+1)}; i <= N; ++i) fact_inv[i] = inv(fact[i]);
        n = N;
        return true;
    }
 
    long long power(long long a, unsigned long long b){
        long long ret{1};
        while(b){
            if(b & 1) ret = (ret * a) % m;
            a = (a * a) % m;
            b /= 2;
            if(ret < 0) ret += m;
            if(a < 0) a += m;
        }
        return ret;
    }
 
    long long inv(long long a){ // GCD(a, m) = 1
        return power(a, m - 2);
    }
 
    long long permutation(int n, int r){
        if(n < r) return 0;
        if(n < 0 || r < 0) return 0;
        if(this->n < n) resize(n);
        long long ret(fact[n]);
        ret = ret * fact_inv[n - r] % m;
        return ret;
    }
 
    long long combination(int n, int r){
        if(n < r) return 0;
        if(n < 0 || r < 0) return 0;
        long long ret{permutation(n, r)};
        return ret * fact_inv[r] % m;
    }

    long long multi_combination(int n, int r){
        return combination(n + r - 1, r);
    }
 
    long long factorial(int a){
        return fact[a];
    }
 
    long long inv_factorial(int a){
        return fact_inv[a];
    }

};

int main(){
    int N, M, K; std::cin >> N >> M >> K;
    long long ans{};
    if(N <= M + K){
        comb_perm<MOD> cp;
        ans += cp.combination(N+M, N);
        (ans -= cp.combination(N+M, M+K+1)) %= MOD;
        if(ans < 0) ans += MOD;  
    }
    std::cout << ans << std::endl;
    return 0;
}

#include <iostream>
#include <cstdint>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <vector>
#include <list>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cctype>
#include <cassert>
#include <climits>
#include <string>
#include <bitset>
#include <cfloat>
#include <unordered_set>
#pragma GCC optimize("Ofast")

using namespace std;
typedef long double ld;
typedef long long int ll;
typedef unsigned long long int ull;
typedef vector<int> vi;
typedef vector<char> vc;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef vector<string> vs;
typedef vector<ll> vll;
typedef vector<pair<int, int>> vpii;
typedef vector<vector<int>> vvi;
typedef vector<vector<char>> vvc;
typedef vector<vector<string>> vvs;
typedef vector<vector<ll>> vvll;

#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rrep(i, n) for (int i = 1; i <= (n); ++i)
#define irep(it, stl) for (auto it = stl.begin(); it != stl.end(); it++)
#define drep(i, n) for (int i = (n)-1; i >= 0; --i)
#define CHOOSE3(a) CHOOSE4 a
#define CHOOSE4(a0, a1, a2, x, ...) x
#define mes_1(a) cout << (a) << endl
#define mes_2(a, b) cout << (a) << " " << (b) << endl
#define mes_3(a, b, c) cout << (a) << " " << (b) << " " << (c) << endl
#define mes(...)                                   \
    CHOOSE3((__VA_ARGS__, mes_3, mes_2, mes_1, ~)) \
    (__VA_ARGS__)
#define CHOOSE(a) CHOOSE2 a
#define CHOOSE2(a0, a1, a2, a3, a4, x, ...) x
#define debug_1(x1) cout << #x1 << ": " << x1 << endl
#define debug_2(x1, x2) cout << #x1 << ": " << x1 << ", " #x2 << ": " << x2 << endl
#define debug_3(x1, x2, x3) cout << #x1 << ": " << x1 << ", " #x2 << ": " << x2 << ", " #x3 << ": " << x3 << endl
#define debug_4(x1, x2, x3, x4) cout << #x1 << ": " << x1 << ", " #x2 << ": " << x2 << ", " #x3 << ": " << x3 << ", " #x4 << ": " << x4 << endl
#define debug_5(x1, x2, x3, x4, x5) cout << #x1 << ": " << x1 << ", " #x2 << ": " << x2 << ", " #x3 << ": " << x3 << ", " #x4 << ": " << x4 << ", " #x5 << ": " << x5 << endl
#define debug(...)                                                        \
    CHOOSE((__VA_ARGS__, debug_5, debug_4, debug_3, debug_2, debug_1, ~)) \
    (__VA_ARGS__)

#define ynmes(a) (a) ? mes("Yes") : mes("No")
#define YNmes(a) (a) ? mes("YES") : mes("NO")
#define re0 return 0
#define mp(p, q) make_pair(p, q)
#define pb(n) push_back(n)
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define Sort(a) sort(a.begin(), a.end())
#define rSort(a) sort(a.rbegin(), a.rend())
#define Rev(a) reverse(a.begin(), a.end())
#define MATHPI acos(-1)
#define itn int;
int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
template <class T>
inline bool chmax(T &a, T b)
{
    if (a < b)
    {
        a = b;
        return 1;
    }
    return 0;
}
template <class T>
inline bool chmin(T &a, T b)
{
    if (a > b)
    {
        a = b;
        return 1;
    }
    return 0;
}
struct io
{
    io()
    {
        ios::sync_with_stdio(false);
        cin.tie(0);
    }
};
const int INF = INT_MAX;
const ll LLINF = 1LL << 60;
const ll MOD = 1000000007;
const double EPS = 1e-9;

ll gcd(ll a, ll b)
{
    return b ? gcd(b, a % b) : a;
}

ll lcm(ll a, ll b)
{
    return a / gcd(a, b) * b;
}

ll nlcm(vector<ll> numbers)
{
    ll res;
    res = numbers[0];
    for (ll i = 1; i < (ll)numbers.size(); i++)
    {
        res = lcm(res, numbers[i]);
    }
    return res;
}

uintmax_t ncr(unsigned int n, unsigned int r)
{
    if (r * 2 > n)
        r = n - r;
    uintmax_t dividend = 1;
    uintmax_t divisor = 1;
    for (unsigned int i = 1; i <= r; ++i)
    {
        dividend *= (n - i + 1);
        divisor *= i;
    }
    return dividend / divisor;
}

signed main()
{
    ll a, b, c;
    cin >> a >> b >> c;
    ynmes(a * a + b * b < c * c);
}
