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<head><title>2d array ds</title>
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<h2>Yanzhan's solution for "2d array ds"</h2>
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<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>
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<h3>
solution:
</h3>
<pre class="yanzhan-hidden"><code class="c++">int hourglassSum(vector<vector<int>> arr) {
int res = numeric_limits<int>::min();
for (int i = 1; i <= arr.size() - 2; i++) {
for (int j = 1; j <= arr[i].size() - 2; j++) {
int sum = 0;
sum += arr[i - 1][j - 1] + arr[i - 1][j] + arr[i - 1][j + 1];
sum += arr[i][j];
sum += arr[i + 1][j - 1] + arr[i + 1][j] + arr[i + 1][j + 1];
res = max(res, sum);
}
}
return res;
}
</code></pre>
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