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1271-1280

1271. Hexspeak $\star$

1272. Remove Interval $\star\star$

1273. Delete Tree Nodes $\star\star$

1274. Number of Ships in a Rectangle $\star\star\star$

1275. Find Winner on a Tic Tac Toe Game $\star$

1276. Number of Burgers with No Waste of Ingredients $\star\star$

1277. Count Square Submatrices with All Ones $\star\star$

1278. Palindrome Partitioning III $\star\star\star$

1279. Traffic Light Controlled Intersection $\star$

1280. Students and Examinations $\star$