Baekjoon-1292-쉽게 푸는 문제
19 Sep 2022A = []
i=1
while len(A) <= 1000:
for _ in range(i):
A.append(i)
i += 1
start,end = map(int, input().split(' '))
print(sum(A[start-1:end]))
A = []
i=1
while len(A) <= 1000:
for _ in range(i):
A.append(i)
i += 1
start,end = map(int, input().split(' '))
print(sum(A[start-1:end]))