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20 lines
444 B
C++
20 lines
444 B
C++
#include <bits/stdc++.h>
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using namespace std;
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long long t, n, m, k;
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int main() {
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cin >> t;
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while (t--) {
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cin >> n >> m >> k;
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k -= 2;
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if (n == 1) {
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cout << (m == 0 && k >= 0 ? "YES" : "NO") << endl;
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} else {
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cout << ((m < n - 1 || n * (n - 1) < m * 2 || (n * (n - 1) == m * 2 && k < 1) || (n * (n - 1) > m * 2 && k < 2)) ? "NO" : "YES") << endl;
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}
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}
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return 0;
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}
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