```go
package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	in := bufio.NewReaderSize(os.Stdin, 1<<20)
	out := bufio.NewWriterSize(os.Stdout, 1<<20)
	defer out.Flush()

	var t int
	fmt.Fscan(in, &t)
	for ; t > 0; t-- {
		var n int
		fmt.Fscan(in, &n)
		minVal := int64(1<<63 - 1)
		cntMin := 0
		for i := 0; i < n; i++ {
			var x int64
			fmt.Fscan(in, &x)
			if x < minVal {
				minVal = x
				cntMin = 1
			} else if x == minVal {
				cntMin++
			}
		}
		if cntMin == n {
			fmt.Fprintln(out, "NO")
		} else {
			fmt.Fprintln(out, "YES")
		}
	}
}
```