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<head><title>anagrams</title>
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<body>
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<h2>Yanzhan's solution for "anagrams"</h2>
<ul>
<li>Hi, I'm Yanzhan. For more algothmic problems, visit my Youtube Channel <a href="https://www.youtube.com/channel/UCDkz-__gl3frqLexukpG0DA?view_as=subscriber" target=_blank>[Yanzhan Yang's Youtube Channel]</a> or my Twitter Account <a href="https://twitter.com/YangYanzhan" target=_blank>[Yanzhan Yang's Twitter]</a> or my GitHub HomePage <a href="https://github.com/yangyanzhan/code-camp" target=_blank>[Yanzhan Yang's GitHub Project]</a> .</li>
<li>It's fascinating to solve algothmic problems, follow Yanzhan to learn more!</li>
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<div>
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<h3>
solution:
</h3>
<pre class="yanzhan-hidden"><code class="c++">string toKey(string raw) {
sort(raw.begin(), raw.end());
return raw;
}
vector<vector<int>> Solution::anagrams(const vector<string> &A) {
vector<vector<int>> res;
map<string, int> mapping;
int n = A.size();
for (int i = 0; i < n; i++) {
string key = toKey(A[i]);
if (mapping.find(key) != mapping.end()) {
int idx = mapping[key];
res[idx].push_back(i + 1);
} else {
mapping[key] = res.size();
res.push_back(vector<int>{i + 1});
}
}
return res;
}
</code></pre>
<ul class="yanzhan-hidden">
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