diff --git a/examples/wip/abc200_b.py b/examples/wip/abc200_b.py
new file mode 100644
index 00000000..21418d5b
--- /dev/null
+++ b/examples/wip/abc200_b.py
@@ -0,0 +1,19 @@
+# https://atcoder.jp/contests/abc200/tasks/abc200_b
+
+from typing import *
+
+def solve(n: int, k: int) -> int:
+    for _ in range(k):
+        if n % 200 == 0:
+            n //= 200
+        else:
+            n = n*1000 + 200
+    return n
+
+def main() -> None:
+    n, k = map(int, input().split())
+    ans = solve(n, k)
+    print(ans)
+
+if __name__ == '__main__':
+    main()
diff --git a/examples/wip/abc203_b.py b/examples/wip/abc203_b.py
new file mode 100644
index 00000000..bfa29ebe
--- /dev/null
+++ b/examples/wip/abc203_b.py
@@ -0,0 +1,19 @@
+# https://atcoder.jp/contests/abc203/tasks/abc203_b
+
+from typing import *
+
+def solve(n: int, k: int) -> int:
+    a = []
+    for i in range(1,n+1):
+        for j in range(1,k+1):
+            a.append(100*i + j)   
+    ans = sum(a)
+    return ans
+
+def main() -> None:
+    n, k = map(int, input().split())
+    ans = solve(n, k)
+    print(ans)
+
+if __name__ == '__main__':
+    main()
diff --git a/examples/wip/abc204_b.py b/examples/wip/abc204_b.py
new file mode 100644
index 00000000..2c4de92e
--- /dev/null
+++ b/examples/wip/abc204_b.py
@@ -0,0 +1,20 @@
+# https://atcoder.jp/contests/abc204/tasks/abc204_b
+
+from typing import *
+
+def solve(n: int, a: List[int]) -> int:
+    ans = 0
+    for e in a:
+        if e > 10:
+            ans += e - 10
+    return ans
+
+def main() -> None:
+    n = int(input())
+    a = list(map(int, input().split()))
+    assert len(a) == n
+    ans = solve(n, a)
+    print(ans)
+
+if __name__ == '__main__':
+    main()
diff --git a/examples/wip/abc206_b.py b/examples/wip/abc206_b.py
new file mode 100644
index 00000000..3f6e1670
--- /dev/null
+++ b/examples/wip/abc206_b.py
@@ -0,0 +1,22 @@
+# https://atcoder.jp/contests/abc206/tasks/abc206_b
+
+from typing import *
+
+def solve(n: int) -> int:
+    c = 0
+    ans = 0
+    flag = True
+    for i in range(100000): # (10^5)^2 > 10^9
+        c += i
+        if c >= n and flag:
+            ans = i
+            flag = False
+    return ans
+
+def main() -> None:
+    n = int(input())
+    ans = solve(n)
+    print(ans)
+
+if __name__ == '__main__':
+    main()
diff --git a/examples/wip/abc207_b.py b/examples/wip/abc207_b.py
new file mode 100644
index 00000000..4249edc4
--- /dev/null
+++ b/examples/wip/abc207_b.py
@@ -0,0 +1,17 @@
+# https://atcoder.jp/contests/abc207/tasks/abc207_b
+
+from typing import *
+
+def solve(a: int, b: int, c: int, d: int) -> int:
+    ans = -1
+    if d*c - b > 0:
+        ans = (a + d*c - b - 1) // (d*c - b) # ans = a /^ (d*c - b)
+    return ans
+
+def main() -> None:
+    a, b, c, d = map(int, input().split())
+    ans = solve(a, b, c, d)
+    print(ans)
+
+if __name__ == '__main__':
+    main()
diff --git a/examples/wip/abc208_b.py b/examples/wip/abc208_b.py
new file mode 100644
index 00000000..819a72ca
--- /dev/null
+++ b/examples/wip/abc208_b.py
@@ -0,0 +1,23 @@
+# https://atcoder.jp/contests/abc208/tasks/abc208_b
+
+from typing import *
+
+def solve(p: int) -> int:
+    e = 1
+    cs = []
+    ans = 0
+    for i in range(10):
+        e *= i+1
+        cs.append(e)
+    for c in reversed(cs):
+        ans += p//c
+        p -= p//c * c
+    return ans
+
+def main() -> None:
+    p = int(input())
+    ans = solve(p)
+    print(ans)
+
+if __name__ == '__main__':
+    main()