func_code_string: #include <bits/stdc++.h>   using namespace std;   using PII = pair<int, int>;   using PLL = pair<long long, long long>;   using VLL = vector<long long>;   using VI = vector<int>;   inline void fastio() {     ios::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);   }   const int INF = 0x3f3f3f3f;   const long long LINF = 0x3f3f3f3f3f3f3f3fL;   const int mod1 = 998244353;   const int mod2 = 1e9 + 7;   void solve() {     int n, m, k;     cin >> n >> m >> k;     if (k <= 1) {       cout <<  NO  << endl;       return;     }     if (m < n - 1) {       cout <<  NO  << endl;       return;     }     long long cnt = 1ll * n * (n - 1) / 2;     if (m > cnt) {       cout <<  NO  << endl;       return;     }     if (k == 2 && n > 1) {       cout <<  NO  << endl;       return;     }     if (k >= 2 && n == 1) {       cout <<  YES  << endl;       return;     }     if (k > 3) {       cout <<  YES  << endl;       return;     }     if (m == cnt) {       cout <<  YES  << endl;     } else {       cout <<  NO  << endl;     }   }   signed main() {     fastio();     int t;     cin >> t;     while (t--) solve();     return 0;   }   