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Maximum Product of Three Numbers in C++
Suppose we have an integer array; we have to find three numbers whose product is maximum then return the maximum product.
So, if the input is like [1,1,2,3,3], then the output will be 18, as the three elements are [2,3,3].
To solve this, we will follow these steps −
sort the array nums
l := size of nums
a := nums[l - 1], b := nums[l - 2], c := nums[l - 3], d := nums[0], e := nums[1]
return maximum of a * b * c and d * e * a
Example
Let us see the following implementation to get better understanding −
#include <bits/stdc++.h>
using namespace std;
class Solution {
public:
int maximumProduct(vector<int>& nums) {
sort(nums.begin(), nums.end());
int l = nums.size();
int a = nums[l - 1], b = nums[l - 2], c = nums[l - 3], d = nums[0], e = nums[1];
return max(a * b * c, d * e * a);
}
};
main(){
Solution ob;
vector<int> v = {1,1,2,3,3};
cout << (ob.maximumProduct(v));
}Input
{1,1,2,3,3}Output
18
Updated on: 11-Jun-2020
551 Views
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