题解 | #尼科彻斯定理#
尼科彻斯定理
http://www.nowcoder.com/practice/dbace3a5b3c4480e86ee3277f3fe1e85
import java.io.*;
import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
while(sc.hasNextInt()){
System.out.println(fun(sc.nextInt()));
}
}
public static String fun(int n){
StringBuilder sb = new StringBuilder();
int start = n * (n - 1) + 1;
for(int i = 0; i < n; ++i){
sb.append(start + i * 2);
sb.append("+");
}
sb.deleteCharAt(sb.length()-1);
return sb.toString();
}
} 
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