import sys
input = sys.stdin.readline

N,Q=map(int,input().split())
Query=[list(map(int,input().split())) for i in range(Q)]

TIME=[0]*(10**5+1)

for i,s,t in Query:
    TIME[s]+=1
    TIME[t]-=1

for i in range(1,10**5+1):
    TIME[i]+=TIME[i-1]


LIST=[0]

for i in range(10**5+1):
    if TIME[i]!=0:
        LIST.append(LIST[-1]+1/TIME[i])
    else:
        LIST.append(0)

ANS=[0]*N

for i,s,t in Query:
    ANS[i-1]+=LIST[t]-LIST[s]

for ans in ANS:
    print(ans)