Submission #633081

#	Time	Username	Problem	Language	Result	Execution time	Memory
633081		karolb2011	Potatoes and fertilizers (LMIO19_bulves)	Pypy 3	100 / 100	580 ms	53204 KiB

bulves

import sys
import heapq as hq
input = sys.stdin.readline
n=int(input())
t=0
p=0
s=[]
ww=0
z=[]
for i in range(n):
    pi,bi=list(map(int,input().split()))
    p+=pi-bi
    s.append(p)
if p==0:
    for c in s:
        ww+=abs(c)
elif p==1:
    for c in s:
        if c>=1:
            ww+=c
            t+=c-1
        else:
            ww-=c
            t-=c-1
        z.append(ww-t)
    ww=min(t,min(z)+t)
        
else:
    w=[]
    for c in s:
        if c<0:
            ww-=c
            c=0
        elif c>p:
            ww+=c-p
            c=p
        hq.heappush(w,-c)
        if w[0]<-c:
            hq.heappush(w,-c)
            ww+=abs(-hq.heappop(w)-c)
print(ww)

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36