A06 - How Many Guests?
https://atcoder.jp/contests/tessoku-book/tasks/math_and_algorithm_ai
提出
code: python
n, q = map(int, input().split())
a = list(map(int, input().split()))
lr =
list(map(int, input().split())) for _ in range(q)
wa =
0
for v in a:
wa.append(wa
-1
+ v)
for l, r in lr:
print(wa
r
- wa
l-1
)