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)
print(min(ww,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)
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
2900 KB |
Output is correct |
2 |
Correct |
25 ms |
3052 KB |
Output is correct |
3 |
Correct |
27 ms |
3000 KB |
Output is correct |
4 |
Correct |
104 ms |
4908 KB |
Output is correct |
5 |
Correct |
201 ms |
6976 KB |
Output is correct |
6 |
Correct |
475 ms |
12928 KB |
Output is correct |
7 |
Execution timed out |
1014 ms |
22836 KB |
Time limit exceeded |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
2900 KB |
Output is correct |
2 |
Correct |
25 ms |
3052 KB |
Output is correct |
3 |
Correct |
27 ms |
3000 KB |
Output is correct |
4 |
Correct |
104 ms |
4908 KB |
Output is correct |
5 |
Correct |
201 ms |
6976 KB |
Output is correct |
6 |
Correct |
475 ms |
12928 KB |
Output is correct |
7 |
Execution timed out |
1014 ms |
22836 KB |
Time limit exceeded |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
2900 KB |
Output is correct |
2 |
Correct |
25 ms |
3052 KB |
Output is correct |
3 |
Correct |
18 ms |
2900 KB |
Output is correct |
4 |
Correct |
17 ms |
2992 KB |
Output is correct |
5 |
Correct |
19 ms |
2988 KB |
Output is correct |
6 |
Correct |
24 ms |
3104 KB |
Output is correct |
7 |
Correct |
21 ms |
3012 KB |
Output is correct |
8 |
Correct |
28 ms |
3104 KB |
Output is correct |
9 |
Correct |
21 ms |
3156 KB |
Output is correct |
10 |
Incorrect |
20 ms |
3028 KB |
Output isn't correct |
11 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
2900 KB |
Output is correct |
2 |
Correct |
25 ms |
3052 KB |
Output is correct |
3 |
Correct |
27 ms |
3000 KB |
Output is correct |
4 |
Correct |
18 ms |
2900 KB |
Output is correct |
5 |
Correct |
17 ms |
2992 KB |
Output is correct |
6 |
Correct |
19 ms |
2988 KB |
Output is correct |
7 |
Correct |
24 ms |
3104 KB |
Output is correct |
8 |
Correct |
21 ms |
3012 KB |
Output is correct |
9 |
Correct |
28 ms |
3104 KB |
Output is correct |
10 |
Correct |
21 ms |
3156 KB |
Output is correct |
11 |
Incorrect |
20 ms |
3028 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
2900 KB |
Output is correct |
2 |
Correct |
25 ms |
3052 KB |
Output is correct |
3 |
Correct |
27 ms |
3000 KB |
Output is correct |
4 |
Correct |
18 ms |
2900 KB |
Output is correct |
5 |
Correct |
17 ms |
2992 KB |
Output is correct |
6 |
Correct |
19 ms |
2988 KB |
Output is correct |
7 |
Correct |
24 ms |
3104 KB |
Output is correct |
8 |
Correct |
21 ms |
3012 KB |
Output is correct |
9 |
Correct |
28 ms |
3104 KB |
Output is correct |
10 |
Correct |
21 ms |
3156 KB |
Output is correct |
11 |
Correct |
104 ms |
4908 KB |
Output is correct |
12 |
Correct |
201 ms |
6976 KB |
Output is correct |
13 |
Correct |
475 ms |
12928 KB |
Output is correct |
14 |
Execution timed out |
1014 ms |
22836 KB |
Time limit exceeded |
15 |
Halted |
0 ms |
0 KB |
- |