#include <iostream>
using namespace std;
int& maxElement(int arr[], int size){
int maxEle = 0;
for (int i = 0; i < size;i++) {
if (arr[i] > arr[maxEle]) {
maxEle = i;
}
}
return arr[maxEle];
}
int main() {
int arr[4] = {10,50,30,20};
cout << maxElement(arr,4) <<endl;
return 0;
}
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