2200 - 2299
2235 - Add Two Integers (Easy)
Problem Link
https://leetcode.com/problems/add-two-integers/
Problem Statement
Given two integers num1 and num2, return the sum of the two integers.
Example 1:
Input: num1 = 12, num2 = 5
Output: 17
Explanation: num1 is 12, num2 is 5, and their sum is 12 + 5 = 17, so 17 is returned.Example 2:
Input: num1 = -10, num2 = 4
Output: -6
Explanation: num1 + num2 = -6, so -6 is returned.Constraints:
-100 <= num1, num2 <= 100
Approach 1: A + B
class Solution {
public:
int sum(int num1, int num2) {
return num1 + num2;
}
};Approach 2: Half Adder
class Solution {
public:
int sum(int num1, int num2) {
return num2 == 0 ? num1 : sum(num1 ^ num2, (unsigned) (num1 & num2) << 1);
}
};Approach 3: Log & Exp
class Solution {
public:
int sum(int num1, int num2) {
return log(exp(num1) * exp(num2)));
}
};