add

Author: IsHYuhi

ABC/ABC131/A.py

@@ -0,0 +1,6 @@
+s = input()
+for i in range(len(s)-1):
+    if s[i]==s[i+1]:
+        print('Bad')
+        exit()
+print('Good')

ABC/ABC131/B.py

@@ -0,0 +1,10 @@
+n, l = map(int, input().split())
+apples = [l+i-1 for i in range(1, n+1)]
+mn = float('inf')
+idx = 0
+for i in range(n):
+    if mn>abs(apples[i]):
+        mn = abs(apples[i])
+        idx = i
+
+print(sum(apples)-apples[idx])

ABC/ABC131/C.py

@@ -0,0 +1,7 @@
+import math
+def lcm(a, b):
+    return (a*b)//math.gcd(a, b)
+
+a, b, c, d = map(int, input().split())
+ans = (b-(a-1))-(b//c-(a-1)//c)-(b//d-(a-1)//d)+(b//lcm(c,d)-(a-1)//lcm(c,d))
+print(ans)