Jenga Night

Chef hosts a party for his birthday. There are $N$ people at the party. All these $N$ people decide to play Jenga. There are $X$ Jenga tiles available. In one round, all the players pick $1$ tile each and place it in the tower. The game is *valid* if: - All the players have a tile in each round; - All the tiles are used at the end. Given $N$ and $X$, find whether the game is *valid*. ### Inpu