11.js

var out = require("./timer");
var data = [
	[8,2,22,97,38,15,0,40,0,75,4,5,7,78,52,12,50,77,91,8],
	[49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,4,56,62,0],
	[81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,3,49,13,36,65],
	[52,70,95,23,4,60,11,42,69,24,68,56,1,32,56,71,37,2,36,91],
	[22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80],
	[24,47,32,60,99,3,45,2,44,75,33,53,78,36,84,20,35,17,12,50],
	[32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70],
	[67,26,20,68,2,62,12,20,95,63,94,39,63,8,40,91,66,49,94,21],
	[24,55,58,5,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72],
	[21,36,23,9,75,0,76,44,20,45,35,14,0,61,33,97,34,31,33,95],
	[78,17,53,28,22,75,31,67,15,94,3,80,4,62,16,14,9,53,56,92],
	[16,39,5,42,96,35,31,47,55,58,88,24,0,17,54,24,36,29,85,57],
	[86,56,0,48,35,71,89,7,5,44,44,37,44,60,21,58,51,54,17,58],
	[19,80,81,68,5,94,47,69,28,73,92,13,86,52,17,77,4,89,55,40],
	[4,52,8,83,97,35,99,16,7,97,57,32,16,26,26,79,33,27,98,66],
	[88,36,68,87,57,62,20,72,3,46,33,67,46,55,12,32,63,93,53,69],
	[4,42,16,73,38,25,39,11,24,94,72,18,8,46,29,32,40,62,76,36],
	[20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,4,36,16],
	[20,73,35,29,78,31,90,1,74,31,49,71,48,86,81,16,23,57,5,54],
	[1,70,54,71,83,51,54,69,16,92,33,48,61,43,52,1,89,19,67,48]
];

function search(x,y){
	var mx =0;
	if (x>2){ //search left/right
		var p=1;
		for (var i=0;i<4;i++){
			p *=  data[y][x-i];
		}
		mx=Math.max(p,mx);
	}
	if (y>2) { //search up/down
		var p=1;
		for (var i=0;i<4;i++){
			p *= data[y-i][x];
		}
		mx=Math.max(p,mx);
	}
	if (x>2 && y>2) { //search diagonal
		var p=1;
		for (var i=0;i<4;i++){
			p *= data[y-i][x-i];
		}
		mx=Math.max(p,mx);
	}
	if (x<17 && y>2) { //search diagonal2
		var p=1;
		for (var i=0;i<4;i++){
			p *= data[y-i][x+i];
		}
		mx=Math.max(p,mx);
	}
	
	
	return mx;
}
var mrx=0;
for (var x=0;x<20;x++){
	for (var y=0;y<20;y++){
		mrx = Math.max(mrx,search(x,y));
	}
}

out.print(mrx);