#include <stdio.h>
int acc(int x){
	static int sum=0;
	static int count=0;
	if(x>=0)
	{
		sum+=x;
		count++;
		return sum;
	}
	else if(x==-1)
	{
		return sum;
	}
	else if(x==-2)
	{
		return count;
	}
	else
	{
		return -1;
	}
}
int main(void) {
printf("%d\n", acc(3));
printf("%d\n", acc(4));
printf("%d\n", acc(-3));
printf("%d\n", acc(-2));
printf("%d\n", acc(-1));
printf("%d\n", acc(5));
return 0;
}