For problem statement at 1000-1999/1500-1599/1520-1529/1528/problemB.txt this is a correct solution, but verifier at 1000-1999/1500-1599/1520-1529/1528/verifierB.go ends with mismatch on test 1
input:67
expected:755573142
got:2278 can you fix the verifier?  ```go
package main

import (
	"fmt"
)

func main() {
	var n int64
	fmt.Scan(&n)
	const mod int64 = 998244353
	ans := n % mod * ((n + 1) % mod) % mod * 499122177 % mod
	fmt.Println(ans)
}
```