제출 #548550

#제출 시각아이디문제언어결과실행 시간메모리
548550beaconmcExhibition (JOI19_ho_t2)Pypy 3
0 / 100
48 ms18324 KiB
from heapq import *
n,m = map(int, input().split())
pictures = []
frames = []
for i in range(n):
    pictures.append(list(map(int, input().split())))

for i in range(m):
    frames.append(int(input()))

pictures.sort(key=lambda x:(x[1], x[0]))
frames.sort()

cur = 0
ans = 0
for i in range(m):
    if cur!= n and pictures[cur][0] > frames[i]:
        cur+= 1
        continue
    ans += 1
    cur += 1
    

print(ans)
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#Verdict Execution timeMemoryGrader output
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