C++ :

#include <algorithm>
#include <cstdio>
using namespace std;
const int N = 105;
int n;
int a[N];
int cnt;
int main() {
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) scanf("%d", &a[i]);
	while (1) {
	int mx = n;
	for (int i = 1; i <= n; i++)
	if (a[i] >= a[mx]) mx = i;
	if (a[mx] == 0) break;
	int mn = a[mx];
	for (int i = 1; i <= n; i++)
	if (a[i] > 0) mn = min(mn, a[i]);
	a[mx] -= mn;
	cnt++;
	}
	printf("%d\n", cnt);
	return 0;
}