C :

#include <stdio.h>
int main()
{
	int n;
	long long max, t;
	while (scanf("%d", &n) != EOF){
		scanf("%lld", &t);
		max = t;
		for (int i = 1; i < n; i++){
			scanf("%lld", &t);
			if (t > max)
				max = t;
		}
		printf("%lld\n", max);
	}
}

C++ :

#include <stdio.h>
int main()
{
	long long n, t, max;
	while (scanf("%lld", &n) != EOF){
		scanf("%lld", &t);
		max = t;
		for (int i = 1; i < n; i++){
			scanf("%lld", &t);
			if (t > max)
				max = t;
		}
		printf("%lld\n", max);
	}
}