結果
| 問題 | No.165 四角で囲え! |
| コンテスト | |
| ユーザー |
aru aru
|
| 提出日時 | 2020-08-29 13:43:16 |
| 言語 | Go (1.23.4) |
| 結果 |
AC
|
| 実行時間 | 379 ms / 5,000 ms |
| コード長 | 3,321 bytes |
| コンパイル時間 | 13,092 ms |
| コンパイル使用メモリ | 229,332 KB |
| 実行使用メモリ | 6,820 KB |
| 最終ジャッジ日時 | 2024-11-14 06:05:16 |
| 合計ジャッジ時間 | 14,246 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
ソースコード
package main
import (
"bufio"
"fmt"
"os"
"sort"
"strconv"
)
func out(x ...interface{}) {
fmt.Println(x...)
}
var sc = bufio.NewScanner(os.Stdin)
func getInt() int {
sc.Scan()
i, e := strconv.Atoi(sc.Text())
if e != nil {
panic(e)
}
return i
}
func getInts(N int) []int {
ret := make([]int, N)
for i := 0; i < N; i++ {
ret[i] = getInt()
}
return ret
}
func getString() string {
sc.Scan()
return sc.Text()
}
// min, max, asub, absなど基本関数
func max(a, b int) int {
if a > b {
return a
}
return b
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func asub(a, b int) int {
if a > b {
return a - b
}
return b - a
}
func abs(a int) int {
if a >= 0 {
return a
}
return -a
}
func lowerBound(a []int, x int) int {
idx := sort.Search(len(a), func(i int) bool {
return a[i] >= x
})
return idx
}
func upperBound(a []int, x int) int {
idx := sort.Search(len(a), func(i int) bool {
return a[i] > x
})
return idx
}
func main() {
sc.Split(bufio.ScanWords)
N, B := getInt(), getInt()
x := make([]int, N)
y := make([]int, N)
p := make([]int, N)
mx := make(map[int]int)
my := make(map[int]int)
for i := 0; i < N; i++ {
x[i], y[i], p[i] = getInt(), getInt(), getInt()
mx[x[i]]++
my[y[i]]++
}
// get xy
px := make([]int, 0, len(mx))
py := make([]int, 0, len(my))
for xx := range mx {
px = append(px, xx)
}
for yy := range my {
py = append(py, yy)
}
sort.Ints(px)
sort.Ints(py)
mx = make(map[int]int)
my = make(map[int]int)
for i, xx := range px {
mx[xx] = i + 1
}
for i, yy := range py {
my[yy] = i + 1
}
// make cost table
ny := len(my)
nx := len(mx)
c := make([][]int, ny+1)
num := make([][]int, ny+1)
for yy := 0; yy <= ny; yy++ {
c[yy] = make([]int, nx+1)
num[yy] = make([]int, nx+1)
}
for i := 0; i < N; i++ {
xpos := mx[x[i]]
ypos := my[y[i]]
c[ypos][xpos] = p[i]
num[ypos][xpos] = 1
}
// for yy := 0; yy <= ny; yy++ {
// out(c[yy])
// }
// out("-------------")
// for yy := 0; yy <= ny; yy++ {
// out(num[yy])
// }
// out("-------------")
for yy := 0; yy <= ny; yy++ {
for xx := 1; xx <= nx; xx++ {
c[yy][xx] += c[yy][xx-1]
num[yy][xx] += num[yy][xx-1]
}
}
for xx := 0; xx <= nx; xx++ {
for yy := 1; yy <= ny; yy++ {
c[yy][xx] += c[yy-1][xx]
num[yy][xx] += num[yy-1][xx]
}
}
// for yy := 0; yy <= ny; yy++ {
// out(c[yy])
// }
// out("-------------")
// for yy := 0; yy <= ny; yy++ {
// out(num[yy])
// }
// 積分画像作成完了C
cnt := 0
for sy := 1; sy <= ny; sy++ {
for ey := sy; ey <= ny; ey++ {
sx, ex := 1, 0
// out("Y", sy, ey, nx, ny)
for sx <= nx && ex <= nx {
cost := 0
d := 0
for cost <= B {
ex++
if ex > nx {
break
}
cost = c[ey][ex] - c[sy-1][ex] - c[ey][sx-1] + c[sy-1][sx-1]
d = num[ey][ex] - num[sy-1][ex] - num[ey][sx-1] + num[sy-1][sx-1]
// out("EX", sx, ex, nx, cost, d)
if cost <= B {
cnt = max(cnt, d)
}
}
for cost > B {
sx++
if ex > nx {
break
}
// out("SX", sx, ex, nx)
cost = c[ey][ex] - c[sy-1][ex] - c[ey][sx-1] + c[sy-1][sx-1]
d = num[ey][ex] - num[sy-1][ex] - num[ey][sx-1] + num[sy-1][sx-1]
if cost <= B {
cnt = max(cnt, d)
}
}
// out(sx, ex)
}
}
}
out(cnt)
}
aru aru