import sys,re

def part_1():
    with open(sys.argv[1]) as f:
        x1,x2,y1,y2=map(int,re.findall('-?\d+',f.read()))
    ymax=-y1-1
    print((ymax*(ymax+1))//2)


def part_2():
    with open(sys.argv[1]) as f:
        x1,x2,y1,y2=map(int,re.findall('-?\d+',f.read()))
    cnt=0
    for vy in range(y1,1-y1):
        y,i,vx=0,0,set()
        while y1<=y:
            x,j=0,0
            if y<=y2:
                while x<=x2:
                    if x1<=x: vx.add(j)
                    j,x=j+1,x+min(j, i)
            i,y,vy=i+1,y+vy,vy-1
        cnt+=len(vx)
    print(cnt)


if __name__=="__main__":
    from time import time
    t1=time()
    part_1()
    part_2()
    print(time()-t1)