For problem statement at 0-999/400-499/490-499/498/problemB.txt this is a correct solution, but verifier at 0-999/400-499/490-499/498/verifierB.go ends with All tests passed can you fix the verifier? package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)

	scanInt := func() int {
		scanner.Scan()
		res := 0
		for _, b := range scanner.Bytes() {
			res = res*10 + int(b-'0')
		}
		return res
	}

	scanner.Scan()
	if len(scanner.Bytes()) == 0 {
		return
	}
	n := 0
	for _, b := range scanner.Bytes() {
		n = n*10 + int(b-'0')
	}
	T := scanInt()

	f := make([]float64, T+1)
	f[0] = 1.0
	ans := 0.0

	for i := 0; i < n; i++ {
		pi := scanInt()
		ti := scanInt()

		p := float64(pi) / 100.0
		probTi := 1.0
		if ti-1 > 0 {
			probTi = math.Pow(1.0-p, float64(ti-1))
		}
		probTiP := probTi * p

		fNew := make([]float64, T+1)
		S := 0.0

		for tPrime := 1; tPrime <= T; tPrime++ {
			S = S * (1.0 - p)
			S = S + f[tPrime-1]*p
			if tPrime-ti >= 0 {
				S = S - f[tPrime-ti]*probTiP
				fNew[tPrime] = S + f[tPrime-ti]*probTi
			} else {
				fNew[tPrime] = S
			}
			ans += fNew[tPrime]
		}
		f = fNew
	}

	fmt.Printf("%.9f\n", ans)
}