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Legal StudiesC++ 中不重複（不同）元素的陣列中的乘積
給定一個包含重複或重複元素的陣列，任務是找到給定陣列中所有不重複或不同的元素的乘積並顯示結果。
示例
Input-: arr[] = {2, 1, 1, 2, 3, 4, 5, 5 }
Output-: 120
Explanation-: Since 1, 2 and 5 are repeating more than once so we will take them into
consideration for their first occurrence. So result will be 1 * 2 * 3 * 4 * 5 = 120
Input-: arr[] = {1, 10, 9, 4, 2, 10, 10, 45, 4 }
Output-: 32400
Explanation-: Since 10 and 4 are repeating more than once so we will take them into consideration
for their first occurrence. So result will be 1 * 10 * 9 * 4 * 2 * 45 = 32400以下程式中使用的方法如下 -
- 將重複元素輸入到陣列中
- 為了獲得更好的方法，按升序對陣列的元素排序，這樣可以輕鬆確定哪個陣列元素重複，並且不將它考慮在內
- 找到陣列中的所有不同元素，並繼續透過儲存結果將它們相乘
- 將所有不同元素的乘積顯示為陣列中的最終結果
演算法
Start
Step 1-> Declare function to find the product of all the distinct elements in an array
int find_Product(int arr[], int size)
Declare and set int prod = 1
Create variable as unordered_set<int> s
Loop For i = 0 and i < size and i++
IF s.find(arr[i]) = s.end()
Set prod *= arr[i]
Call s.insert(arr[i])
End
End
return prod
Step 2 -: In main()
Declare and set int arr[] = { 2, 1, 1, 2, 3, 4, 5, 5 }
Calculate the size of an array int size = sizeof(arr) / sizeof(int)
Call find_Product(arr, size)
Stop示例
include <bits/stdc++.h>
using namespace std;
//function that calculate the product of non-repeating elements
int find_Product(int arr[], int size) {
int prod = 1;
unordered_set<int> s;
for (int i = 0; i < size; i++) {
if (s.find(arr[i]) == s.end()) {
prod *= arr[i];
s.insert(arr[i]);
}
}
return prod;
}
int main() {
int arr[] = { 2, 1, 1, 2, 3, 4, 5, 5 };
int size = sizeof(arr) / sizeof(int);
cout<<"product of all non-repeated elements are : "<<find_Product(arr, size);
return 0;
}輸出
product of all non-repeated elements are : 120
更新於: 20-Dec-2019
160 次瀏覽
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