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35D.go
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35D.go
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package main
import (
"bufio"
. "fmt"
"io"
)
// github.com/EndlessCheng/codeforces-go
func CF35D(_r io.Reader, _w io.Writer) {
in := bufio.NewReader(_r)
out := bufio.NewWriter(_w)
defer out.Flush()
max := func(a, b int) int {
if a > b {
return a
}
return b
}
var n, maxW int
Fscan(in, &n, &maxW)
ws := make([]int, n)
for i := range ws {
Fscan(in, &ws[i])
ws[i] *= n - i
}
dp := make([][]int, n+1)
for i := range dp {
dp[i] = make([]int, maxW+1)
}
for i, wi := range ws {
for j, dpij := range dp[i] {
if j < wi {
dp[i+1][j] = dpij
} else {
dp[i+1][j] = max(dpij, dp[i][j-wi]+1)
}
}
}
Fprint(_w, dp[n][maxW])
}
//func main() { r, _ := os.Open("input.txt"); w, _ := os.Create("output.txt"); CF35D(r, w) }