显示原始代码
#include <bits/stdc++.h>
using pii = std::pair<int, int>;
using tuu = std::tuple<int, int, int>;
#define pb push_back
using std::cin, std::cout, std::string, std::vector;
int read(int x = 0, int f = 0, char ch = getchar()) {
while (ch < 48 or 57 < ch) f = ch == 45, ch = getchar();
while (48 <= ch and ch <= 57) x = x * 10 + ch - 48, ch = getchar();
return f ? -x : x;
}
const int N = 1e6 + 5;
int n, k;
int a[5];
void solve() {
n = read(), k = read();
a[0] = a[1] = a[2] = a[3] = 0;
for (int i = 1; i <= n; i++) {
int l = read(), r = read();
if (l >= k + 1 or r <= k - 1)
continue;
if (l <= k - 1 and k + 1 <= r)
continue;
if (l == r and l == k)
a[0]++;
else if (l <= k - 1 and r == k)
a[2]++;
else if (l == k and k + 1 <= r)
a[3]++;
}
if (a[2] != 0 or a[3] != 0 or a[0] != 0)
puts("YES");
else
puts("NO");
}
signed main() {
#ifndef ONLINE_JUDGE
freopen("E.in", "r", stdin);
#endif
for (int T = read(); T--; solve())
;
return 0;
}