#316 백준 파이썬 [18245] 이상한 나라의 암호

https://www.acmicpc.net/problem/18245

 

PYTHON CODE

string = str(input())
line = 2

while string != "Was it a cat I saw?":
    for i in range(0, len(string), line):
        print(string[i], end = '')
    print()
    
    line += 1
    string = str(input())