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 <algorithm>
#include <cstdio>

using namespace std;

int peper[11][11];

void paint(int x, int y)
{
	if (x * y >= 0 && x >= 0){
		peper[y][x]++;
	}
}

int main()
{
	int x, y;
	int size;
	
	while (scanf("%d,%d,%d", &x, &y, &size) != EOF){
		peper[y][x]++;
		
		if (size > 0){
			paint(x, y - 1);
			paint(x, y + 1);
			paint(x - 1, y);
			paint(x + 1, y);
		}
		if (size > 1){
			paint(x + 1, y - 1);
			paint(x + 1, y + 1);
			paint(x - 1, y + 1);
			paint(x - 1, y - 1);
		}
		if (size > 2){
			paint(x, y - 2);
			paint(x, y + 2);
			paint(x - 2, y);
			paint(x + 2, y);
		}
	}
	int dark = 0;
	int blank = 0;
	
	for (int i = 0; i < 10; i++){
		for (int j = 0; j < 10; j++){
			if (peper[i][j] == 0)	blank++;
			dark = max(dark, peper[j][i]);
		}
	}
	printf("%d\n%d\n", blank, dark);
	return (0);
}

C++: #include <iostream>
#include <stack>

using namespace std;

void Solution()
{

    int ink[][2] = {{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}}; // range from small size to big size
    
    int x;
    int y;
    int size;
    char comma;
    
    int a[10][10] = {{0}}; // the boundary, +1 for judging the spread of ink
    
    int count = 0;
    int density = 0;
    
    while (cin>>x>>comma>>y>>comma>>size)
    {
        for (int i = 0; i <= size * 4; i++)
        {
            if (x + ink[i][0] > 10 || x + ink[i][0] < 0 || y + ink[i][1] > 10 || y + ink[i][1] < 0)
            {
                continue;
            }
            else
            {
                a[x + ink[i][0]][y + ink[i][1]]++;
            }
        
        }
        
    }
    
    for (int i = 0; i < 10; i++)
    {
        for (int j = 0; j < 10; j++)
        {
            if(a[i][j] > 0)
            {
                count = count+1;
            }
            
            if (a[i][j] > density)
            {
                density = a[i][j];
            }
        }
    }

    
    cout<<100 - count<<endl;
    cout<<density<<endl;

}

int main()
{
    Solution();
    return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
int data[15][15]={0};
int main(){
	
	int x,y,s;
	char c;
	while(scanf("%d,%d,%d",&x,&y,&s)!=EOF){
		
		while(1){
			data[x][y]++;
			if(y-1>=0)data[x][y-1]++;
			if(x+1<10)data[x+1][y]++;
			if(y+1<10)data[x][y+1]++;
			if(x-1>=0)data[x-1][y]++;
			if(s==1)break;
			if(x+1<10 && y+1<10)data[x+1][y+1]++;
			if(x+1<10 && y-1>=0)data[x+1][y-1]++;
			if(x-1>=0 && y-1>=0)data[x-1][y-1]++;
			if(x-1>=0 && y+1<10)data[x-1][y+1]++;
			if(s==2)break;
			if(x+2<10)data[x+2][y]++;
			if(y-2>=0)data[x][y-2]++;
			if(y+2<10)data[x][y+2]++;
			if(x-2>=0)data[x-2][y]++;
			break;
		}
		
	}
	int white=0,ma=0;
	for(int i=0;i<10;i++){
		for(int j=0;j<10;j++){
			if(data[i][j]==0)white++;
			ma=max(ma,data[i][j]);
		}
	}
	
	cout<<white<<" "<<ma<<endl;
}

C++: #include<iostream>
#include<string>
#include<cstdio>
#include<algorithm>
#include<stack>
#include<queue>
#include<vector>
#include<cmath>
#include<utility>
#include<set>
#include<complex>
#define vi vector<int>
#define vvi vector<vector<int> >
#define ll long long int
#define vl vector<ll>
#define vvl vector<vector<ll>>
#define ld long double
#define INF 1e9
#define EPS 0.0000000001
#define rep(i,n) for(int i=0;i<n;i++)
#define CC puts("-------ok--------");
#define all(in) in.begin(), in.end()
#define bv vector<bool>
using namespace std;
typedef pair<int, int>PA;
using namespace std;
#define MAX 1e7
int sx[] = {0,0,-1,1};
int sy[] = {1,-1,0,0};
int my[] = {0,0,1,1,1,-1,-1,-1};
int mx[] = {1,-1,0,1,-1,0,1,-1};
int lx[] = {0,0,0,0,1,1,1,2,-1,-1,-1,-2};
int ly[] = {1,-1,2,-2,0,1,-1,0,0,-1,1,0};
int  main(){
    
    vvi v(12,vi(12,0));
    vi x(100,0); vi y(100,0); vi ink(100,0);
    int i =0; char c,d;
    while(cin >> x[i] >>c>>y[i] >>d >> ink[i]){
        v[y[i]][x[i]]+=1;
        if(ink[i] == 1){
            rep(j,4){
                int tx =x[i]+sx[j]; int ty = y[i]+sy[j];
                if(0<=tx && tx<10 && 0<=ty && ty<10)
                    v[ty][tx]+=1;
            }
        }else if(ink[i] == 2){
            rep(j,8){
                int tx =x[i]+mx[j]; int ty = y[i]+my[j];
                if(0<=tx && tx<10 && 0<=ty && ty<10)
                    v[ty][tx]+=1;
                }
        }else if(ink[i] == 3){
                rep(j,12){
                    int tx =x[i]+lx[j]; int ty = y[i]+ly[j];
                    if(0<=tx && tx<10 && 0<=ty && ty<10)
                        v[ty][tx]+=1;
                }
        }
        i++;
    }
        int ans1 = -INF; int ans2 = 0;
        rep(i,10) rep(j,10){
            ans1 = max(ans1,v[i][j]);
            if(v[i][j]  == 0)
                ans2++;
        }
    cout << ans2<< endl;
    cout << ans1<< endl;
        
    return 0;

C++: #include<iostream>
int main(){
  int paper[10][10],x,y,a,max=0;
  std::string s;
  for(x=0; x<10; x++)
    for(y=0; y<10; y++)
      paper[x][y]=0;

  while(std::cin>>s){
    x=s.at(0)-'0';
    y=s.at(2)-'0';
    a=s.at(4)-'0';
      paper[x][y]++;
      if(x>0) paper[x-1][y]++;
      if(x<9) paper[x+1][y]++;
      if(y>0) paper[x][y-1]++;
      if(y<9) paper[x][y+1]++;

    if(a>1){
      if(x>0&&y>0) paper[x-1][y-1]++;
      if(x<9&&y>0) paper[x+1][y-1]++;
      if(x>0&&y<9) paper[x-1][y+1]++;
      if(x<9&&y<9) paper[x+1][y+1]++;
    }
    if(a>2){
      if(x>1)paper[x-2][y]++;
      if(y>1)paper[x][y-2]++;
      if(x<8)paper[x+2][y]++;
      if(y<8)paper[x][y+2]++;
    }
  }

  for(x=0,a=0;x<10;x++)
    for(y=0;y<10;y++){
      paper[x][y]==0 ? a++:0,
      paper[x][y]>max ? max=paper[x][y]:0;
    }
      std::cout<<a<<"\n"<<max<<"\n";
}