백준_단계별로 풀어보기_3단계 반복문
########## 백준 2739 ########## n = int(input()) for i in range(1,10): print(f"{n} * {i} = {n*i}") ########## 백준 10950 ########## t = int(input()) for _ in range(t): a, b = map(int, input().split()) print(a+b) # # 고수코드 # import sys # input = sys.stdin.readline # for _ in range(int(input())): # a, b = map(int, input().split()) # print() ########## 백준 8393 ########## n = int(input()) print(n*(n+1)//..