Problem:
Score : 100 points

Problem Statement

We have an N \times N square grid.

We will paint each square in the grid either black or white.

If we paint exactly A squares white, how many squares will be painted black?

Constraints

1 \leq N \leq 100

0 \leq A \leq N^2

Inputs

Input is given from Standard Input in the following format:

N
A

Outputs

Print the number of squares that will be painted black.

Sample Input 1

3
4

Sample Output 1

5

There are nine squares in a 3 \times 3 square grid.
Four of them will be painted white, so the remaining five squares will be painted black.

Sample Input 2

19
100

Sample Output 2

261

Sample Input 3

10
0

Sample Output 3

100

As zero squares will be painted white, all the squares will be painted black.

Solution in JavaScript (node.js v5.12) (judge verdict: Runtime Error)

var obj = init();
Main();
function nextInt(){return myconv(next(),1);}
function nextStrArray(){return myconv(next(),2);}//半角スペース分割
function nextIntArray(){return myconv(next(),4);}//半角スペース + 数値化
function nextCharArray(){return myconv(next(),6);}//1文字分割
function next(){return obj.next();}
function hasNext(){return obj.hasNext();}
function myin(){return require("fs").readFileSync("/dev/stdin", "utf8").trim().split("\n");}
function init(){
  var inputFile = myin();
  var returnObj = {
    "list" : inputFile, "index" : 0, "max" : inputFile.length,
    "hasNext" : function(){return (this.index < this.max);},
    "next" : function(){if(!this.hasNext()){throw "ArrayIndexOutOfBoundsException これ以上ないよ";}else{var returnInput = this.list[this.index];this.index++;return returnInput;}}
  };
  return returnObj;
}
function myout(t){console.log(t);}//標準出力
function myerr(t){console.error(t);}//標準エラー出力
//[no]要素の扱い。数値型
//不明値、異常時:引数そのまま返す　1:数値へ変換
//2:半角SPで分割 4:半角SPで分割し、数値配列へ
//6:1文字で分割  7:1文字で分割し、数値配列へ
//8:半角SPで結合 9:改行で結合 0:文字なしで結合
function myconv(i,no){try{switch(no){case 1:return parseInt(i);case 2:return i.split(" ");case 4:return i.split(" ").map((a)=>Number(a));case 6:return i.split("");case 7:return i.split("").map((a)=>Number(a));case 8:return i.join(" ");case 9:return i.join("\n");case 0:return i.join("");default:return i;}}catch(e){return i;}}
function Main(){
 var N = nextInt();
	var list = new Array(N);
	for(var i = 0; i < N; i++){
		list[i] = nextIntArray();
	}
	var minus = 0;
	var output = 0;
	for(var i = 0; i < N; i++){
		for(var j = 0; j < N; j++){
			output += list[i][j];
		}
	}
	myerr(output);	
	output /= 2;
	var used = new Set();
	for(var k = 0; k < N; k++){
		for(var i = 0; i < N; i++){
			for(var j = 0; j < N; j++){
				if(list[i][j] > (list[i][k] + list[k][j])){
					myout(-1);
					return;
				}else if(list[i][j] == (list[i][k] + list[k][j]) && i != k && j != k){
					var num = Math.min(i,j).toString() + ":" + Math.max(i,j).toString();
 					if(!used.has(num)){
						minus += list[i][j];
						used.add(num);
						//myerr((i + 1) + "," + (j + 1) + "," + (k + 1));
					}
					
				}
			}
		}
	}
	myerr(minus);
	//minus /= 2;
	myout(output - minus);
}