Submission #3019138

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Source Code Expand

N,M=map( int, raw_input().split() )

S=[ map( int, raw_input().split() ) for i in range(M) ]

C=[ 0  for i in range(N+1)  ]

for l,r in S:
	for i in range(l,r+1):
		C[i]+=1

A=[]

ans=0
for idx,x in enumerate(S):
	l=x[0]
	r=x[1]
	for i in range(l,r+1):
		if C[i]>1:
			continue
		else:
			break
	else:
		A.append(idx+1)
		ans+=1
print ans
for x in A: print x

Submission Info

Judge Result