HDU 1001 Sum Problem JAVA
2017-09-21 19:36
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import java.util.Scanner; public class Main{ public static void main(String[] args){ int sum,n; Scanner in=new Scanner(System.in); while(in.hasNextInt()){ sum=0; n=in.nextInt(); if(n==0){ System.out.println(sum); System.out.println(); continue; } if(n%2==0) sum=n/2*(n+1); else sum=(n+1)/2*n; System.out.println(sum); System.out.println(); } } }
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