// 通过了，这道题int型太小无法覆盖用例，用for循环易超时 // 找规律发现了为：等差数列前N项和的问题 import java.util.*; public class Main{ public static void main(String[] args){ Scanner scanner = new Scanner(System.in); Long begin = scanner.nextLong(); Long end = scanner.nextLong(); Long interval = scan...
