Functions are a bunch of statements glued together. A function is provided with zero or more arguments, and it executes the statements on it. Based on the return type, it either returns nothing (void) or something.

The syntax for a function is

return_type function_name(arg_type_1 arg_1, arg_type_2 arg_2, â€¦) {

â€¦

â€¦

â€¦

[if return_type is non void]

return something of type `return_type`

;

}

For example, a function to return the sum of four parameters can be written as

int sum_of_four(int a, int b, int c, int d) {

int sum = 0;

sum += a;

sum += b;

sum += c;

sum += d;

return sum;

}

Write a function int max_of_four(int a, int b, int c, int d) which returns the maximum of the four arguments it receives.

+= : Add and assignment operator. It adds the right operand to the left operand and assigns the result to the left operand.

a += b is equivalent to a = a + b;

Input Format

Input will contain four integers – , one per line.

Output Format

Return the greatest of the four integers.

PS: I/O will be automatically handled.

Sample Input

3

4

6

5

Sample Output

6

**SOLUTION :**

```
#include <iostream>
using namespace std;
int max_of_four(int a, int b, int c, int d) {
return max(max(a,b),max(c,d));
}
int main() {
int a, b, c, d;
cin >> a >> b >> c >> d;
int ans = max_of_four(a, b, c, d);
cout << ans;
return 0;
}
```

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