from sys import stdin
input=stdin.readline

def solv():
    N,M=[int(x) for x in input().split()]
    if N>M:
        N,M=M,N
    K=max(1,int((2*N)**0.5)-1)
    while N>=(K+1)**2//2 and M>=((K+1)**2+1)//2:
        K+=1
    return K

print(solv())