#include <bits/stdc++.h>

using i64 = long long;
using u64 = unsigned long long;
using u32 = unsigned;

using u128 = unsigned __int128;
using i128 = __int128;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int A, B, C;
    std::cin >> A >> B >> C;

    std::cout << (A + B + C > 2 * std::max(A, std::max(B, C)) ? "Yes" : "No");

    return 0;
}