n, k = map(int, input().split())
for i in range(n):
    if k == (i+1)*(i+2)//2: print(1); exit()
ans = 0; i = n+1
for v in range(n, 0, -1):
    if k >= v: k -= v; i = v
    elif i == v+1: ans += 1
print(ans)