diff --git a/src/indeed_tokyo.md b/src/indeed_tokyo.md
new file mode 100644
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+++ b/src/indeed_tokyo.md
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+```python
+"""第一题"""
+tmp = input().split()
+n, q = int(tmp[0]), int(tmp[1])
+nums = [int(i) for i in input().split()]
+idx_ms = []
+for i in range(q):
+    tmp = input().split()
+    idx, m = int(tmp[0]), int(tmp[1])
+    idx_ms.append([idx, m])
+sums = sum([i for i in nums if i & 1 == 0])
+res = [sums] * (q+1)
+for i in range(q):
+    flag = nums[idx_ms[i][0]-1] & 1 == 0
+
+    if flag and idx_ms[i][1] + nums[idx_ms[i][0]-1] & 1 == 0:
+        res[i+1] = res[i] + idx_ms[i][1]
+    elif flag and idx_ms[i][1] + nums[idx_ms[i][0]-1] & 1 != 0:
+        res[i+1] = res[i] - nums[idx_ms[i][0] - 1]
+    elif not flag and idx_ms[i][1] + nums[idx_ms[i][0]-1] & 1 == 0:
+        res[i + 1] = res[i] + idx_ms[i][1] + nums[idx_ms[i][0] - 1]
+
+    else:
+        res[i+1] = res[i]
+
+    nums[idx_ms[i][0] - 1] += idx_ms[i][1]
+
+# print(res[1:])
+
+for i in range(q):
+    print(res[i+1])
+
+
+
+
+
+"""第二题"""
+import sys
+N = int(input())
+nums = [-sys.maxsize] + [int(i) for i in input().split()]
+res = 0
+flag = 1
+for i in range(len(nums)):
+    if nums[i] >= nums[i-1]:
+        continue
+    elif nums[i] <= 0 and -nums[i] >= nums[i-1]:
+        res += 1
+        nums[i] = -nums[i]
+    elif nums[i] <= 0 and -nums[i] < nums[i-1]:
+        flag = 0
+        print(-1)
+        break
+    elif nums[i] < nums[i-1] and nums[i] > 0:
+        flag = 0
+        print(-1)
+        break
+if flag:
+    print(res)
+    
+    
+    
+
+"""第三题"""
+class Solution():
+    def __init__(self):
+        self.res = 0
+        self.lst = []
+    def sol(self):
+        tmp = input().split()
+        row, col = int(tmp[0]), int(tmp[1])
+
+        grid = []
+        for i in range(row):
+            grid.append([i for i in input()])
+        def bfs_paths(grid, start, goal):
+            if start[0] == goal[0] and start[1] == goal[1]:
+                self.res += 1
+            if start[0] == row-1 and start[1] == col-1:
+                return
+            # print(start, goal)
+            if 0 <= start[0] + 1 < row and grid[start[0]+1][start[1]] == '.':
+                bfs_paths(grid, [start[0]+1,start[1]], goal)
+            if 0 <= start[1] + 1 < col and grid[start[0]][start[1]+1] == '.':
+                bfs_paths(grid, [start[0],start[1]+1], goal)
+            # return res
+        n = int(input())
+        for i in range(n):
+            tmp = input().split()
+            goal1, goal2 = int(tmp[0]), int(tmp[1])
+            # print(goal1, goal2)
+
+
+            bfs_paths(grid, [0,0], [goal1-1,goal2-1])
+            # print([goal1-1,goal2-1])
+            self.lst.append(self.res % (pow(10, 9) + 7))
+            self.res = 0
+
+
+s = Solution()
+s.sol()
+for i in s.lst:
+    print(i)
+    
+    
+
+"""第四题"""
+tmp = input().split()
+n, m = int(tmp[0]), int(tmp[1])
+requi = []
+for i in range(m):
+    nums = [int(i) for i in input().split()]
+    requi.append(nums)
+
+keys =set([1])
+rooms = set([1])
+# flag = True
+while True:
+    flag1 = False
+    for i in requi:
+
+        if i[0] in rooms and i[1] not in rooms:
+            if i[2] in keys:
+                flag1 = True
+                rooms.add(i[1])
+                keys.add(i[1])
+    if not flag1:
+        break
+
+print(len(rooms))
+```