leetcode

Random Bit Manipulation Problems

4 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/ Problems/0007.cpp b/ Problems/0007.cpp

@@ -0,0 +1,19 @@

class Solution {

public:

int reverse(int x) {

if (x == INT_MIN || x == INT_MAX) return 0;

bool neg = false;

unsigned long res = 0;

if (x < 0) {

neg = true;

x = -x;

}

do { res = res * 10 + x % 10; } while ((x /= 10) > 0);

if (res > INT_MAX) return 0;

return !neg ? res : -res;

}

};

diff --git a/ Problems/0268.cpp b/ Problems/0268.cpp

@@ -0,0 +1,8 @@

class Solution {

public:

int missingNumber(vector<int> &nums) {

int res = nums.size();

for (int i = 0; i < nums.size(); i++) res ^= i ^ nums[i];

return res;

}

};

diff --git a/ Problems/0371.cpp b/ Problems/0371.cpp

@@ -0,0 +1,12 @@

class Solution {

public:

int getSum(int a, int b) {

unsigned c;

while (b) {

c = a & b;

a ^= b;

b = c << 1;

}

return a;

}

};

diff --git a/ README.md b/ README.md

@@ -30,6 +30,7 @@ for solving problems. | 0003 | Medium | [Longest Substring Without Repeating Characters](Problems/0003.cpp) | | 0005 | Medium | [Longest Palindromic Substring](Problems/0005.cpp) | | 0006 | Medium | [Zigzag Conversion](Problems/0006.cpp) |

| 0007 | Medium | [Reverse Integer](Problems/0007.cpp) |

| 0011 | Medium | [Container With Most Water](Problems/0011.cpp) | | 0012 | Medium | [Integer to Roman](Problems/0012.cpp) | | 0013 | Easy | [Roman to Integer](Problems/0013.cpp) |

@@ -175,6 +176,7 @@ for solving problems. | 0257 | Easy | [Binary Tree Paths](Problems/0257.cpp) | | 0263 | Easy | [Ugly Number](Problems/0263.cpp) | | 0264 | Medium | [Ugly Number II](Problems/0264.cpp) |

| 0268 | Easy | [Missing Number](Problems/0268.cpp) |

| 0278 | Easy | [First Bad Version](Problems/0278.cpp) | | 0279 | Medium | [Perfect Squares](Problems/0279.cpp) | | 0283 | Easy | [Move Zeroes](Problems/0283.cpp) |

@@ -198,6 +200,7 @@ for solving problems. | 0347 | Medium | [Top K Frequent Elements](Problems/0347.cpp) | | 0350 | Easy | [Intersection of Two Arrays II](Problems/0350.cpp) | | 0352 | Hard | [Data Stream as Disjoint Intervals](Problems/0352.cpp) |

| 0371 | Medium | [Sum of Two Integers](Problems/0371.cpp) |

| 0374 | Easy | [Guess Number Higher or Lower](Problems/0374.cpp) | | 0376 | Medium | [Wiggle Subsequence](Problems/0376.cpp) | | 0377 | Medium | [Combination Sum IV](Problems/0377.cpp) |