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feat: add solutions to lc problem: No.0030
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No.0030.Substring with Concatenation of All Words
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@yanglbme
yanglbme committed Jan 17, 2025
1 parent 58c2190 commit 78ad9b9
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Showing 10 changed files with 364 additions and 429 deletions.
267 changes: 120 additions & 147 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/README.md
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267 changes: 120 additions & 147 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/README_EN.md
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37 changes: 21 additions & 16 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2,37 +2,42 @@ class Solution {
public:
vector<int> findSubstring(string s, vector<string>& words) {
unordered_map<string, int> cnt;
for (auto& w : words) {
++cnt[w];
for (const auto& w : words) {
cnt[w]++;
}
int m = s.size(), n = words.size(), k = words[0].size();

vector<int> ans;
int m = s.length(), n = words.size(), k = words[0].length();

for (int i = 0; i < k; ++i) {
unordered_map<string, int> cnt1;
int l = i, r = i;
int t = 0;
unordered_map<string, int> cnt1;
while (r + k <= m) {
string w = s.substr(r, k);
string t = s.substr(r, k);
r += k;
if (!cnt.count(w)) {

if (!cnt.contains(t)) {
cnt1.clear();
l = r;
t = 0;
continue;
}
++cnt1[w];
++t;
while (cnt1[w] > cnt[w]) {
string remove = s.substr(l, k);

cnt1[t]++;

while (cnt1[t] > cnt[t]) {
string w = s.substr(l, k);
if (--cnt1[w] == 0) {
cnt1.erase(w);
}
l += k;
--cnt1[remove];
--t;
}
if (t == n) {

if (r - l == n * k) {
ans.push_back(l);
}
}
}

return ans;
}
};
};
42 changes: 26 additions & 16 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -2,40 +2,50 @@ public class Solution {
public IList<int> FindSubstring(string s, string[] words) {
var cnt = new Dictionary<string, int>();
foreach (var w in words) {
if (!cnt.ContainsKey(w)) {
cnt[w] = 0;
if (cnt.ContainsKey(w)) {
cnt[w]++;
} else {
cnt[w] = 1;
}
++cnt[w];
}
int m = s.Length, n = words.Length, k = words[0].Length;

var ans = new List<int>();
int m = s.Length, n = words.Length, k = words[0].Length;

for (int i = 0; i < k; ++i) {
int l = i, r = i;
var cnt1 = new Dictionary<string, int>();
int l = i, r = i, t = 0;
while (r + k <= m) {
var w = s.Substring(r, k);
var t = s.Substring(r, k);
r += k;
if (!cnt.ContainsKey(w)) {

if (!cnt.ContainsKey(t)) {
cnt1.Clear();
t = 0;
l = r;
continue;
}
if (!cnt1.ContainsKey(w)) {
cnt1[w] = 0;

if (cnt1.ContainsKey(t)) {
cnt1[t]++;
} else {
cnt1[t] = 1;
}
++cnt1[w];
++t;
while (cnt1[w] > cnt[w]) {
--cnt1[s.Substring(l, k)];

while (cnt1[t] > cnt[t]) {
var w = s.Substring(l, k);
cnt1[w]--;
if (cnt1[w] == 0) {
cnt1.Remove(w);
}
l += k;
--t;
}
if (t == n) {

if (r - l == n * k) {
ans.Add(l);
}
}
}

return ans;
}
}
31 changes: 17 additions & 14 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.go
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Original file line number Diff line number Diff line change
@@ -1,31 +1,34 @@
func findSubstring(s string, words []string) (ans []int) {
cnt := map[string]int{}
cnt := make(map[string]int)
for _, w := range words {
cnt[w]++
}
m, n, k := len(s), len(words), len(words[0])
for i := 0; i < k; i++ {
cnt1 := map[string]int{}
l, r, t := i, i, 0
l, r := i, i
cnt1 := make(map[string]int)
for r+k <= m {
w := s[r : r+k]
t := s[r : r+k]
r += k
if _, ok := cnt[w]; !ok {
l, t = r, 0
cnt1 = map[string]int{}

if _, exists := cnt[t]; !exists {
cnt1 = make(map[string]int)
l = r
continue
}
cnt1[w]++
t++
for cnt1[w] > cnt[w] {
cnt1[s[l:l+k]]--
cnt1[t]++
for cnt1[t] > cnt[t] {
w := s[l : l+k]
cnt1[w]--
if cnt1[w] == 0 {
delete(cnt1, w)
}
l += k
t--
}
if t == n {
if r-l == n*k {
ans = append(ans, l)
}
}
}
return
}
}
29 changes: 13 additions & 16 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.java
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Original file line number Diff line number Diff line change
@@ -1,38 +1,35 @@
class Solution {
public List<Integer> findSubstring(String s, String[] words) {
Map<String, Integer> cnt = new HashMap<>();
for (String w : words) {
for (var w : words) {
cnt.merge(w, 1, Integer::sum);
}
int m = s.length(), n = words.length;
int k = words[0].length();
List<Integer> ans = new ArrayList<>();
int m = s.length(), n = words.length, k = words[0].length();
for (int i = 0; i < k; ++i) {
Map<String, Integer> cnt1 = new HashMap<>();
int l = i, r = i;
int t = 0;
Map<String, Integer> cnt1 = new HashMap<>();
while (r + k <= m) {
String w = s.substring(r, r + k);
var t = s.substring(r, r + k);
r += k;
if (!cnt.containsKey(w)) {
if (!cnt.containsKey(t)) {
cnt1.clear();
l = r;
t = 0;
continue;
}
cnt1.merge(w, 1, Integer::sum);
++t;
while (cnt1.get(w) > cnt.get(w)) {
String remove = s.substring(l, l + k);
cnt1.merge(t, 1, Integer::sum);
while (cnt1.get(t) > cnt.get(t)) {
String w = s.substring(l, l + k);
if (cnt1.merge(w, -1, Integer::sum) == 0) {
cnt1.remove(w);
}
l += k;
cnt1.merge(remove, -1, Integer::sum);
--t;
}
if (t == n) {
if (r - l == n * k) {
ans.add(l);
}
}
}
return ans;
}
}
}
45 changes: 26 additions & 19 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.php
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
class Solution {

/**
* @param String $s
* @param String[] $words
Expand All @@ -7,47 +8,53 @@ class Solution {
function findSubstring($s, $words) {
$cnt = [];
foreach ($words as $w) {
if (!isset($cnt[$w])) {
$cnt[$w] = 1;
} else {
if (isset($cnt[$w])) {
$cnt[$w]++;
} else {
$cnt[$w] = 1;
}
}

$ans = [];
$m = strlen($s);
$n = count($words);
$k = strlen($words[0]);
$ans = [];
for ($i = 0; $i < $k; ++$i) {
$cnt1 = [];

for ($i = 0; $i < $k; $i++) {
$l = $i;
$r = $i;
$t = 0;
$cnt1 = [];
while ($r + $k <= $m) {
$w = substr($s, $r, $k);
$t = substr($s, $r, $k);
$r += $k;
if (!array_key_exists($w, $cnt)) {

if (!isset($cnt[$t])) {
$cnt1 = [];
$l = $r;
$t = 0;
continue;
}
if (!isset($cnt1[$w])) {
$cnt1[$w] = 1;

if (isset($cnt1[$t])) {
$cnt1[$t]++;
} else {
$cnt1[$w]++;
$cnt1[$t] = 1;
}
++$t;
while ($cnt1[$w] > $cnt[$w]) {
$remove = substr($s, $l, $k);

while ($cnt1[$t] > $cnt[$t]) {
$w = substr($s, $l, $k);
$cnt1[$w]--;
if ($cnt1[$w] == 0) {
unset($cnt1[$w]);
}
$l += $k;
$cnt1[$remove]--;
$t--;
}
if ($t == $n) {

if ($r - $l == $n * $k) {
$ans[] = $l;
}
}
}

return $ans;
}
}
20 changes: 8 additions & 12 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,24 +5,20 @@ def findSubstring(self, s: str, words: List[str]) -> List[int]:
k = len(words[0])
ans = []
for i in range(k):
cnt1 = Counter()
l = r = i
t = 0
cnt1 = Counter()
while r + k <= m:
w = s[r : r + k]
t = s[r : r + k]
r += k
if w not in cnt:
if cnt[t] == 0:
l = r
cnt1.clear()
t = 0
continue
cnt1[w] += 1
t += 1
while cnt1[w] > cnt[w]:
remove = s[l : l + k]
cnt1[t] += 1
while cnt1[t] > cnt[t]:
rem = s[l : l + k]
l += k
cnt1[remove] -= 1
t -= 1
if t == n:
cnt1[rem] -= 1
if r - l == n * k:
ans.append(l)
return ans
30 changes: 13 additions & 17 deletions solution/0000-0099/0030.Substring with Concatenation of All Words/Solution.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,33 +3,29 @@ function findSubstring(s: string, words: string[]): number[] {
for (const w of words) {
cnt.set(w, (cnt.get(w) || 0) + 1);
}
const m = s.length;
const n = words.length;
const k = words[0].length;
const ans: number[] = [];
for (let i = 0; i < k; ++i) {
const [m, n, k] = [s.length, words.length, words[0].length];
for (let i = 0; i < k; i++) {
let [l, r] = [i, i];
const cnt1: Map<string, number> = new Map();
let l = i;
let r = i;
let t = 0;
while (r + k <= m) {
const w = s.slice(r, r + k);
const t = s.substring(r, r + k);
r += k;
if (!cnt.has(w)) {
if (!cnt.has(t)) {
cnt1.clear();
l = r;
t = 0;
continue;
}
cnt1.set(w, (cnt1.get(w) || 0) + 1);
++t;
while (cnt1.get(w)! - cnt.get(w)! > 0) {
const remove = s.slice(l, l + k);
cnt1.set(remove, cnt1.get(remove)! - 1);
cnt1.set(t, (cnt1.get(t) || 0) + 1);
while (cnt1.get(t)! > cnt.get(t)!) {
const w = s.substring(l, l + k);
cnt1.set(w, cnt1.get(w)! - 1);
if (cnt1.get(w) === 0) {
cnt1.delete(w);
}
l += k;
--t;
}
if (t === n) {
if (r - l === n * k) {
ans.push(l);
}
}
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