Submission #551503

#	Time	Username	Problem	Language	Result	Execution time	Memory
551503		beaconmc	Foehn Phenomena (JOI17_foehn_phenomena)	Pypy 3	100 / 100	511 ms	85396 KiB

foehn_phenomena

import os
import sys
from io import BytesIO, IOBase
 
 
def main():
    pass

# region fastio

BUFSIZE = 8192
 
 
class FastIO(IOBase):
    newlines = 0
 
    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None
 
    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()
 
    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()
 
    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)
 
 
class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")
 

sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")

n,q,s,t = map(int, input().split())

alts = []

def calc(x):
    if x>0:
        x = abs(x)
        return -1*s*x
    elif x<=0:
        x = abs(x)
        return t*x

for i in range(n+1):
    alts.append(int(input()))

queries = []

for i in range(q):
    queries.append(list(map(int, input().split())))

diff = []

for i in range(n):
    diff.append(alts[i+1]-alts[i])


ans = 0
for i in diff:
    ans += calc(i)

for i in queries:
    i[0] -= 1
    a=calc(diff[i[0]])
    if i[1] != n:
        b = calc(diff[i[1]])
    diff[i[0]] += i[2]
    if i[1]!=n:
        diff[i[1]] -= i[2]


    ans += calc(diff[i[0]])-a
    if i[1] != n:
        ans += calc(diff[i[1]])-b
    print(ans)


    

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60