c++ very easy part 5 largest among n numbers

  Number N is passed as the input. The program must accept N integer values and print the largest number L among these N numbers.

Input Format:
The first line denotes the value of N.
The next N lines denote the value of N numbers.

Output Format:
The first line denotes the value of L.

Boundary Conditions:
1 <= N <= 50

Example Input/Output 1:
Input:
3
100
200
40

Output:
200

Example Input/Output 2:
Input:
5
18
500
70
30
999

Output:
999

Code:

#include<bits/stdc++.h>

using namespace std;

int main()
{
    int a,sum=0;
    cin>>a;

for(int i=0;i<a;i++)
{
int b;
cin>>b;

if(sum<b)
sum=b;
}
cout<<sum;
}