Update

Author: Vic-Nas

kattis/Forest for the trees/forest.vn.py

@@ -1,7 +1,7 @@
 # Forest for the trees
 # https://open.kattis.com/problems/forestforthetrees
 # Number-theory
-# 21/01/2025
+# 21/01/2026
 
 
 from math import gcd

kattis/TicTacToe2/tictactoe2.shortest.vn.py

@@ -0,0 +1,10 @@
+g=[0]*9
+for _ in range(int(input())):
+ i=0;w={"X":0,"O":0}
+ for _ in range(3):
+  for c in input():g[i]=c;i+=1
+ try:input()
+ except:0
+ for i,j,k in[(0,1,2),(3,4,5),(6,7,8),(0,3,6),(1,4,7),(2,5,8),(0,4,8),(2,4,6)]:
+  if g[i]==g[j]==g[k]and g[i]in"XO":w[g[i]]=1
+ print("yes"if(d:=g.count("X")-g.count("O"))in(0,1)and not(w["X"]and w["O"])and((not w["X"]and d==0)or(not w["O"]and d==1))else"no")

kattis/TicTacToe2/tictactoe2.vn.py

@@ -1,3 +1,7 @@
+# TicTacToe2
+# https://open.kattis.com/problems/tictactoe2
+# Game solving
+# 31/01/2026
 
 grid = ["" for _ in range(9)]
 
@@ -34,7 +38,7 @@
     }
 
     for i, j, k in lines:
-        if grid[i]==grid[j]==grid[k] and grid[i] in "X0":
+        if grid[i]==grid[j]==grid[k] and grid[i] in "XO":
             wins[grid[i]] = True
 
     # X wins

kattis/Two Stones/2stones.vn.py

@@ -1 +1,6 @@
+# Take Two Stones
+# https://open.kattis.com/problems/twostones
+# Game solving
+# 21/01/2026
+
 print("Alice" if int(input())%2 else "Bob")

kattis/Where is my internet/internet.vn.py

@@ -1,7 +1,7 @@
 # Where is my internet
 # https://open.kattis.com/problems/wheresmyinternet
 # Union-find
-# 21/01/2025
+# 21/01/2026
 
 n, m = map(int, input().split())