踩坑

package java0329;

import java.io.*;
import java.util.*;

public class Main1 {
    public static void main(String[] args) throws Exception {
        int count = 0;
        for (int i = 1; i <= 2025; i++) {
            long x = (long)i*i*i;
            if (x%10==3) count++;
        }
        System.out.println(count);
    }
}

long x = (long)i*i*i;一定加(long)，否则溢出

import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print(409876661809331L);
        scan.close();
    }
}

长数字后一定加L，否则溢出