UVa 11683 - Laser Sculpture (one linear pass is enough)

Link:https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&category=78&page=show_problem&problem=2730
Sol:

#include <cstdio>
	int wantedSize[10010];
	int main()
	{
	int height, length;
	while (scanf("%d %d", &height, &length), height)
	{
	int count(0);
	scanf("%d", &wantedSize[0]);
	count += height - wantedSize[0];
	for (int i = 1; i < length; ++i)
	{
	scanf("%d", &wantedSize[i]);
	if (wantedSize[i] != height)
	{
	int temp = wantedSize[i - 1] - wantedSize[i];
	if (temp > 0)
	count += temp;
	}
	}
	printf("%d\n", count);
	}
	}