結果

問題 No.1439 Let's Compare!!!!
コンテスト
ユーザー ccppjsrb
提出日時 2021-03-26 22:15:52
言語 Go
(1.23.4)
結果
AC  
実行時間 294 ms / 2,000 ms
コード長 7,463 bytes
コンパイル時間 14,317 ms
コンパイル使用メモリ 232,696 KB
実行使用メモリ 21,376 KB
最終ジャッジ日時 2024-11-29 08:49:24
合計ジャッジ時間 16,525 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 17
権限があれば一括ダウンロードができます

ソースコード

diff #
raw source code 

package main

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

func getNextString(scanner *bufio.Scanner) string {
	if !scanner.Scan() {
		panic("scan failed")
	}
	return scanner.Text()
}
func atoi(s string) int                             { x, _ := strconv.Atoi(s); return x }
func getNextInt(scanner *bufio.Scanner) int         { return atoi(getNextString(scanner)) }
func atoi64(s string) int64                         { x, _ := strconv.ParseInt(s, 10, 64); return x }
func getNextInt64(scanner *bufio.Scanner) int64     { return atoi64(getNextString(scanner)) }
func atof64(s string) float64                       { x, _ := strconv.ParseFloat(s, 64); return x }
func getNextFloat64(scanner *bufio.Scanner) float64 { return atof64(getNextString(scanner)) }
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	s := getNextString(scanner)
	t := getNextString(scanner)
	q := getNextInt(scanner)
	ss := make([]int, n)
	tt := make([]int, n)
	tr := newTreeWithIntComparator()
	for i := 0; i < n; i++ {
		ss[i] = int(s[i] - '0')
		tt[i] = int(t[i] - '0')
		if ss[i] != tt[i] {
			tr.Put(i, 1)
		}
	}
	for q > 0 {
		q--
		c := getNextString(scanner)
		x := getNextInt(scanner) - 1
		y := getNextInt(scanner)
		if c == "S" {
			ss[x] = y
		} else {
			tt[x] = y
		}
		if ss[x] == tt[x] {
			tr.Remove(x)
		} else {
			tr.Put(x, 1)
		}
		if tr.Empty() {
			fmt.Fprintln(writer, "=")
			continue
		}
		first := tr.Left().Key.(int)
		if ss[first] < tt[first] {
			fmt.Fprintln(writer, "<")
			continue
		}
		fmt.Fprintln(writer, ">")
	}
}
func max(a, b int) int {
	if a < b {
		return b
	}
	return a
}
func min(a, b int) int { return -max(-a, -b) }
func abs(a int) int    { return max(a, -a) }

type tree struct {
	Root          *node
	Comparator    func(a, b interface{}) int
	allowMultiKey bool
}
type node struct {
	Left, Right, Parent *node
	Key                 interface{}
	Value               interface{}
	size                int
}

func newTreeWithIntComparator() *tree {
	return newTree(func(a, b interface{}) int {
		aa := a.(int)
		bb := b.(int)
		switch {
		case aa < bb:
			return -1
		case aa > bb:
			return 1
		}
		return 0
	})
}
func newTree(comparator func(interface{}, interface{}) int) *tree {
	return &tree{Root: nil, Comparator: comparator}
}
func newMultiKeyTree(comparator func(interface{}, interface{}) int) *tree {
	return &tree{Root: nil, Comparator: comparator, allowMultiKey: true}
}
func newNode(parent *node, key, value interface{}) *node {
	return &node{Parent: parent, Key: key, Value: value, size: 1}
}
func (n *node) IsRoot() bool {
	return n.Parent == nil
}
func (n *node) IsLeft() bool {
	return !n.IsRoot() && n.Parent.Left == n
}
func (n *node) IsRight() bool {
	return !n.IsRoot() && n.Parent.Right == n
}
func (n *node) Update() {
	n.size = 1 + n.Left.Size() + n.Right.Size()
}
func (n *node) Size() int {
	if n == nil {
		return 0
	}
	return n.size
}
func (n *node) MaximumNode() *node {
	if n == nil {
		return n
	}
	if n.Right == nil {
		return n
	}
	return n.Right.MaximumNode()
}
func (n *node) MinimumNode() *node {
	if n == nil {
		return n
	}
	if n.Left == nil {
		return n
	}
	return n.Left.MinimumNode()
}
func (n *node) AppendLeft(m *node) {
	if n == nil {
		return
	}
	n.Left = m
	n.Update()
	if m == nil {
		return
	}
	m.Parent = n
}
func (n *node) AppendRight(m *node) {
	if n == nil {
		return
	}
	n.Right = m
	n.Update()
	if m == nil {
		return
	}
	m.Parent = n
}
func (n *node) Next() *node {
	if n.Right != nil {
		return n.Right.MinimumNode()
	}
	for n.IsRight() {
		n = n.Parent
	}
	if n.IsLeft() {
		return n.Parent
	}
	return nil
}
func (n *node) Prev() *node {
	if n.Left != nil {
		return n.Left.MaximumNode()
	}
	for n.IsLeft() {
		n = n.Parent
	}
	if n.IsRight() {
		return n.Parent
	}
	return nil
}
func (t *tree) Put(key, value interface{}) {
	if t.Root == nil {
		t.Root = newNode(nil, key, value)
		return
	}
	now := t.Root
	for {
		compared := t.Comparator(key, now.Key)
		if compared < 0 {
			if now.Left == nil {
				now.Left = newNode(now, key, value)
				t.Update(now)
				return
			}
			now = now.Left
			continue
		}
		if compared > 0 || t.allowMultiKey {
			if now.Right == nil {
				now.Right = newNode(now, key, value)
				t.Update(now)
				return
			}
			now = now.Right
			continue
		}
		now.Value = value
		break
	}
}
func (t *tree) Get(key interface{}) (interface{}, bool) {
	now := t.Lookup(key)
	if now == nil {
		return nil, false
	}
	return now.Value, true
}
func (t *tree) Lookup(key interface{}) *node {
	now := t.Root
	for now != nil {
		compared := t.Comparator(key, now.Key)
		switch {
		case compared == 0:
			return now
		case compared < 0:
			now = now.Left
		case compared > 0:
			now = now.Right
		}
	}
	return nil
}
func (t *tree) Remove(key interface{}) {
	now := t.Lookup(key)
	if now == nil {
		return
	}
	for now.Size() > 1 {
		if now.Left.Size() > now.Right.Size() {
			t.Rotate(now.Left)
			continue
		}
		t.Rotate(now.Right)
	}
	parent := now.Parent
	switch {
	case now.IsRoot():
		t.Root = nil
	case now.IsLeft():
		parent.Left = nil
	case now.IsRight():
		parent.Right = nil
	}
	for parent != nil {
		parent.Update()
		parent = parent.Parent
	}
}
func (t *tree) Update(now *node) {
	for now != nil {
		now.Update()
		parent := now.Parent
		switch {
		case now.Left.Size() > now.Right.Size():
			t.Rotate(now.Left)
		case now.Left.Size() < now.Right.Size():
			t.Rotate(now.Right)
		}
		now = parent
	}
}
func (t *tree) Rotate(now *node) {
	parent := now.Parent
	grand := parent.Parent
	switch {
	case now.IsRight():
		parent.AppendRight(now.Left)
		now.AppendLeft(parent)
	case now.IsLeft():
		parent.AppendLeft(now.Right)
		now.AppendRight(parent)
	}
	switch {
	case grand == nil:
		t.Root = now
		now.Parent = nil
	case grand.Left == parent:
		grand.AppendLeft(now)
	case grand.Right == parent:
		grand.AppendRight(now)
	}
}
func (t *tree) Right() *node {
	return t.Root.MaximumNode()
}
func (t *tree) Left() *node {
	return t.Root.MinimumNode()
}
func (t *tree) Floor(key interface{}) (*node, bool) {
	now := t.Root
	var n *node
	for now != nil {
		compared := t.Comparator(key, now.Key)
		switch {
		case compared == 0:
			return now, true
		case compared < 0:
			now = now.Left
		case compared > 0:
			n = now
			now = now.Right
		}
	}
	return n, n != nil
}
func (t *tree) Ceiling(key interface{}) (*node, bool) {
	now := t.Root
	var n *node
	for now != nil {
		compared := t.Comparator(key, now.Key)
		switch {
		case compared == 0:
			return now, true
		case compared < 0:
			n = now
			now = now.Left
		case compared > 0:
			now = now.Right
		}
	}
	return n, n != nil
}
func (t *tree) Empty() bool {
	return t.Root == nil
}
func (t *tree) At(i int) (*node, bool) {
	var n *node
	now := t.Root
	for now != nil && i > 0 {
		if i <= now.Left.Size() {
			now = now.Left
			continue
		}
		i -= now.Left.Size() + 1
		if i <= 0 {
			n = now
		}
		now = now.Right
	}
	return n, n != nil
}
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