Go: package main

import (
	"bufio"
	"os"
	"strings"
	"strconv"
	"fmt"
)

func rangeCheck(x, y int) bool {
	if x >= 0 && x <= 9 && y >= 0 && y <= 9 {
		return true
	} else {
		return false
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	paper := make([][]int, 10)
	for i := range paper {
		paper[i] = make([]int, 10)
		for j := range paper[i] {
			paper[i][j] = 0
		}
	}
	// fmt.Println(paper)
	for scanner.Scan() {
		infos := strings.Split(scanner.Text(), ",")
		x, _ := strconv.Atoi(infos[0])
		y, _ := strconv.Atoi(infos[1])
		s, _ := strconv.Atoi(infos[2])
		// fmt.Println(x, y, s)
		switch s {
		case 1:
			paper[x][y]++
			if rangeCheck(x, y-1) {
				paper[x][y-1]++
			}
			if rangeCheck(x, y+1) {
				paper[x][y+1]++
			}
			if rangeCheck(x-1, y) {
				paper[x-1][y]++
			}
			if rangeCheck(x+1, y) {
				paper[x+1][y]++
			}
			continue
		case 2:
			paper[x][y]++
			if rangeCheck(x-1, y-1) {
				paper[x-1][y-1]++
			}
			if rangeCheck(x, y-1) {
				paper[x][y-1]++
			}
			if rangeCheck(x+1, y-1) {
				paper[x+1][y-1]++
			}
			if rangeCheck(x-1, y) {
				paper[x-1][y]++
			}
			if rangeCheck(x+1, y) {
				paper[x+1][y]++
			}
			if rangeCheck(x-1, y+1) {
				paper[x-1][y+1]++
			}
			if rangeCheck(x, y+1) {
				paper[x][y+1]++
			}
			if rangeCheck(x+1, y+1) {
				paper[x+1][y+1]++
			}
			continue
		case 3:
			paper[x][y]++
			if rangeCheck(x-1,y-1) {
				paper[x-1][y-1]++
			}
			if rangeCheck(x,y-1) {
				paper[x][y-1]++
			}
			if rangeCheck(x+1,y-1) {
				paper[x+1][y-1]++
			}
			if rangeCheck(x-1,y) {
				paper[x-1][y]++
			}
			if rangeCheck(x+1,y) {
				paper[x+1][y]++
			}
			if rangeCheck(x-1,y+1) {
				paper[x-1][y+1]++
			}
			if rangeCheck(x,y+1) {
				paper[x][y+1]++
			}
			if rangeCheck(x+1,y+1) {
				paper[x+1][y+1]++
			}
			if rangeCheck(x,y-2) {
				paper[x][y-2]++
			}
			if rangeCheck(x-2,y) {
				paper[x-2][y]++
			}
			if rangeCheck(x+2,y) {
				paper[x+2][y]++
			}
			if rangeCheck(x,y+2) {
				paper[x][y+2]++
			}
			continue
		}
	}
	count := 0
	max := -1
	for i := range paper {
		for j := range paper[i] {
			if paper[i][j] == 0 {
				count++
			}
			if max >= paper[i][j] {
				max = max
			} else {
				max = paper[i][j]
			}
		}
	}
	fmt.Printf("%d\n%d", count, max)
}

C++: #include <iostream>
#include <vector>
#include <map>

class DrawAreaStrategy
{
public:
	DrawAreaStrategy(){}
	virtual ~DrawAreaStrategy(){}

	DrawAreaStrategy(const DrawAreaStrategy&) = delete;
	DrawAreaStrategy& operator=(const DrawAreaStrategy&) = delete;

	DrawAreaStrategy(DrawAreaStrategy&&) = delete;
	DrawAreaStrategy& operator=(DrawAreaStrategy&&) = delete;

	virtual void Draw(std::vector<std::vector<int>>& draw_sheet, int x, int y) = 0;
};

class DrawAreaSmallStrategy
{
public:
	DrawAreaSmallStrategy() {}
	virtual ~DrawAreaSmallStrategy() {}

	DrawAreaSmallStrategy(const DrawAreaSmallStrategy&) = delete;
	DrawAreaSmallStrategy& operator=(const DrawAreaSmallStrategy&) = delete;

	DrawAreaSmallStrategy(DrawAreaSmallStrategy&&) = delete;
	DrawAreaSmallStrategy& operator=(DrawAreaSmallStrategy&&) = delete;

	virtual void Draw(std::vector<std::vector<int>>& draw_sheet, int x, int y)
	{
		static const std::vector<std::pair<int, int>> draw_list
		{
			{ 0,  0 },

			{ -1,  0 },
			{  1,  0 },
			{  0, -1 },
			{  0,  1 }
		};
		for (auto draw_point : draw_list)
		{
			draw_sheet[x + draw_point.first][y + draw_point.second]++;
		}
	}
};


class DrawAreaMiddleStrategy
{
public:
	DrawAreaMiddleStrategy() {}
	virtual ~DrawAreaMiddleStrategy() {}

	DrawAreaMiddleStrategy(const DrawAreaMiddleStrategy&) = delete;
	DrawAreaMiddleStrategy& operator=(const DrawAreaMiddleStrategy&) = delete;

	DrawAreaMiddleStrategy(DrawAreaMiddleStrategy&&) = delete;
	DrawAreaMiddleStrategy& operator=(DrawAreaMiddleStrategy&&) = delete;

	virtual void Draw(std::vector<std::vector<int>>& draw_sheet, int x, int y)
	{
		static const std::vector<std::pair<int, int>> draw_list
		{
			{ 0,  0 },

			{ -1,  0 },
			{ 1,  0 },
			{ 0, -1 },
			{ 0,  1 },

			{ -1, -1 },
			{ -1,  1 },
			{  1, -1 },
			{  1,  1 }
		};
		for (auto draw_point : draw_list)
		{
			draw_sheet[x + draw_point.first][y + draw_point.second]++;
		}
	}
};

class DrawAreaLargeStrategy
{
public:
	DrawAreaLargeStrategy() {}
	virtual ~DrawAreaLargeStrategy() {}

	DrawAreaLargeStrategy(const DrawAreaLargeStrategy&) = delete;
	DrawAreaLargeStrategy& operator=(const DrawAreaLargeStrategy&) = delete;

	DrawAreaLargeStrategy(DrawAreaLargeStrategy&&) = delete;
	DrawAreaLargeStrategy& operator=(DrawAreaLargeStrategy&&) = delete;

	virtual void Draw(std::vector<std::vector<int>>& draw_sheet, int x, int y)
	{
		static const std::vector<std::pair<int, int>> draw_list
		{
			{  0,  0 },

			{ -1,  0 },
			{  1,  0 },
			{  0, -1 },
			{  0,  1 },

			{ -1, -1 },
			{ -1,  1 },
			{  1, -1 },
			{  1,  1 },

			{ -2,  0 },
			{  2,  0 },
			{  0, -2 },
			{  0,  2 }
		};
		for (auto draw_point : draw_list)
		{
			draw_sheet[x + draw_point.first][y + draw_point.second]++;
		}
	}
};

int main()
{
	DrawAreaSmallStrategy small;
	DrawAreaMiddleStrategy middle;
	DrawAreaLargeStrategy large;

	std::vector< std::vector<int> > sheet(10, std::vector<int>(10));

	int x = 0, y = 0, s = 0;
	char a = 0;
	while (std::cin >> x >> a >> y >> a >> s)
	{
		switch (s)
		{
		case 1:
		{
			small.Draw(sheet, x, y);
			break;
		}
		case 2:
		{
			middle.Draw(sheet, x, y);
			break;
		}
		case 3:
		{
			large.Draw(sheet, x, y);
			break;
		}
		default:
			break;
		}
	}

	int empty_num = 0;
	int max_num = 0;

	for (auto line : sheet)
	{
		for (auto cell : line)
		{
			if (0 == cell)
			{
				empty_num++;
				continue;
			}
			if (max_num < cell)
			{
				max_num = cell;
			}
		}
	}
	std::cout << empty_num << "\n" << max_num << std::endl;

	return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,a) FOR(i,0,a)

int f[10][10];

int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1};

int main(){
	int x,y,size;
	while (scanf("%d,%d,%d",&x,&y,&size)!=-1){
		int x2,y2;
		switch (size){
			case 1:
				f[y][x]++;
				REP(i,4){
					x2=x+dx[i];
					y2=y+dy[i];
					if (x2>=0 && x2<10 && y2>=0 && y2<10){
						f[y2][x2]++;
					}
				}
				break;
			case 2:
				FOR(i,-1,2){
					FOR(j,-1,2){
						x2=x+i;
						y2=y+j;
						if (x2>=0 && x2<10 && y2>=0 && y2<10){
							f[y2][x2]++;
						}
					}
				}
				break;
			case 3:
				FOR(i,-1,2){
					FOR(j,-1,2){
						x2=x+i;
						y2=y+j;
						if (x2>=0 && x2<10 && y2>=0 && y2<10){
							f[y2][x2]++;
						}
					}
				}
				REP(i,4){
					x2=x+dx[i]*2;
					y2=y+dy[i]*2;
					if (x2>=0 && x2<10 && y2>=0 && y2<10){
						f[y2][x2]++;
					}
				}
				break;
		}
	}
	int e=0;
	int m=0;
	REP(i,10){
		REP(j,10){
			m=max(m,f[i][j]);
		}
	}
	REP(i,10){
		REP(j,10){
			if (f[i][j]==0){
				e++;
			}
		}
	}
	printf("%d\n%d\n",e,m);
	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<cmath>
#include <string> 
using namespace std;

int main(){
	int x,y,board[10][10],c=0,k=0;
	for(int i=0;i<10;i++){
		for(int j=0;j<10;j++){
			board[i][j]=0;
		}
	}	
	char input[5];
	while( scanf("%s",&input)!=EOF){
		x=input[0]-'0';
		y=input[2]-'0';
		if(input[4]=='1'){
			board[x][y]++;
			board[x+1][y]++;
			board[x-1][y]++;
			board[x][y+1]++;
			board[x][y-1]++;
		}
		if(input[4]=='2'){
			board[x][y]++;
			board[x+1][y]++;
			board[x-1][y]++;
			board[x][y+1]++;
			board[x][y-1]++;
			board[x+1][y+1]++;
			board[x-1][y-1]++;
			board[x-1][y+1]++;
			board[x+1][y-1]++;
		}
		if(input[4]=='3'){
			board[x][y]++;
			board[x+1][y]++;
			board[x-1][y]++;
			board[x][y+1]++;
			board[x][y-1]++;
			board[x+1][y+1]++;
			board[x-1][y-1]++;
			board[x-1][y+1]++;
			board[x+1][y-1]++;
			board[x+2][y]++;
			board[x-2][y]++;
			board[x][y+2]++;
			board[x][y-2]++;
		}
	}
	for(int i=0;i<10;i++){
		for(int j=0;j<10;j++){
			if(board[i][j]==0){
				c++;
			}
			if(board[i][j]>k){
				k=board[i][j];
			}
		}
	}
	printf("%d\n%d\n",c,k);
	
			
	return 0;
}