Problem Description
Date:
2009 / 05/ 09
Analysis
还是递推题, 一刀切两块,两道四块,三道八块,N刀(n*n*n + 5*n + 6) / 6块。尝试推推。这次用java描述吧。
Code:
import java.io.*;
import java.util.Scanner;
public class Cake {
public static void main(String[] args)throws IOException {
Scanner cin = new Scanner(System.in);
while(cin.hasNextInt()){
int n = cin.nextInt();
System.out.println((n*n*n + 5*n + 6) / 6 );
}
}
}
@fleap
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