[SW Expert Academy] 세가지 합 구하기 (D3)

https://swexpertacademy.com/main/code/problem/problemDetail.do?problemLevel=3&contestProbId=AWEbPukqySUDFAWs&categoryId=AWEbPukqySUDFAWs&categoryType=CODE&problemTitle=&orderBy=PASS_RATE&selectCodeLang=ALL&select-1=3&pageSize=10&pageIndex=15

SW Expert Academy

 

import java.util.Scanner;

class Solution {
	public static void main(String[] args) {
		Scanner sc= new Scanner(System.in);
		
		int t = sc.nextInt();
		
		for(int tc=1;tc<=t;tc++) {
			
			long s1=0;
			long s2=0;
			long s3=0;
			
			long n = sc.nextLong();
			
			s1 = (n+1)*n/2;
			s2 = n *n;
			s3 = (n+1)*n;
			
			System.out.println("#"+tc+" "+s1+" "+s2+" "+s3);
			
			
			
		}
		
	}
}

 

범위를 조심하자.

n이 10의 9승 미만

공식을 알아야한다.