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Create 26 September Rotate Deque By K #897

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Sep 26, 2025
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Create 26 September Rotate Deque By K #897

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20 changes: 20 additions & 0 deletions 26 September Rotate Deque By K
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
class Solution {
public:
void rotateDeque(deque<int>& dq, int type, int k) {
int n = dq.size();
if (n == 0) return;

k %= n; // no need to rotate more than n times
if (k == 0) return;

if (type == 1) {
// Right rotation: move last k elements to front
rotate(dq.begin(), dq.end() - k, dq.end());
}
else if (type == 2) {
// Left rotation: move first k elements to back
rotate(dq.begin(), dq.begin() + k, dq.end());
}
}
};

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