HackerEarth Cricket Rating problem solution

In this HackerEarth Cricket Rating problem solution, India is a cricket-crazy nation. Chang also loves cricket and computations related to cricket. Chang has created a Cricket app. This app analyses the performance of a cricketer. If a cricketer under-performs, then a negative rating is awarded. If performance is good, then a positive rating is awarded to the cricketer. Chang wants to analyze the performance of a cricketer over a period of N matches. Chang wants to find the consistency of a cricketer. So he wants to find out the maximum consistent sum of cricket rating of a batsman or a bowler only if his overall rating is positive over that period. Help change in doing so.

#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
 
int prefunction(int a[],int length){
    int max1 = 0,max2 = 0;
    for(int i = 0;i<length;i++){
        max2 = max2 + a[i];
        if(max2 < 0)
            max2 = 0;
        if(max1 < max2)
            max1 = max2;
    }
    return max1;
}
int main()
{
    int n;
    cin >> n;
    int a[n+1];
    for(int i = 0;i<n;i++)
        cin >> a[i];
    int result = prefunction(a,n);
    cout << result << endl;
    return 0;
}