[LeetCode] Reverse Integer
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class Solution {public: int reverse(int x) { // Start typing your C/C++ solution below // DO NOT write int main() function bool neg = false; if (x < 0) { x = -x; neg = true; } int ret = 0; while (x) { ret = 10 * ret + x % 10; x /= 10; } return neg ? -ret : ret; }};Small Case: 4ms
Large Case: 28ms
Time: O(lgn)
Space: O(1)
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