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ndb796
python-for-coding-test
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import sys
input = sys.stdin.readline
# 데이터의 개수(n), 변경 횟수(m), 구간 합 계산 횟수(k)
n, m, k = map(int, input().split())
# 전체 데이터의 개수는 최대 1,000,000개
arr = [0] * (n + 1)
tree = [0] * (n + 1)
# i번째 수까지의 누적 합을 계산하는 함수
def prefix_sum(i):
result = 0
while i > 0:
result += tree[i]
# 0이 아닌 마지막 비트만큼 빼가면서 이동
i -= (i & -i)
return result
# i번째 수를 dif만큼 더하는 함수
def update(i, dif):
while i <= n:
tree[i] += dif
i += (i & -i)
# start부터 end까지의 구간 합을 계산하는 함수
def interval_sum(start, end):
return prefix_sum(end) - prefix_sum(start - 1)
for i in range(1, n + 1):
x = int(input())
arr[i] = x
update(i, x)
for i in range(m + k):
a, b, c = map(int, input().split())
# 업데이트(update) 연산인 경우
if a == 1:
update(b, c - arr[b]) # 바뀐 크기(dif)만큼 적용
arr[b] = c
# 구간 합(interval sum) 연산인 경우
else:
print(interval_sum(b, c))
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