#include <iostream>
using namespace std;

int Volume(int* _Array)
{
	int lv_Volume = 0;

	auto lv_Max = _Array[0];
	for(int lv_SmallVolume = 0; *_Array; ++_Array)
		if(*_Array >= lv_Max)
		{
			lv_Max = *_Array;
			lv_Volume += lv_SmallVolume;
			lv_SmallVolume = 0;
		}
		else
			lv_SmallVolume += lv_Max - *_Array;
	
	return lv_Volume;
}

int main() 
{
	int lv_Array[] = {2,5,1,3,1,2,1,7,7,6};
	auto lv_Volume = Volume(lv_Array);
	
	if( lv_Volume == 17)
		cout << "PASS";
	else
		cout << "FAIL";
	
	return 0;
}