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<functional>
#include<algorithm>
#include<iostream>
#include<utility>
#include<string>
#include<vector>
#include<cmath>
#include<stack>
#include<queue>
#include<deque>
#include<map>
#define rep(i,n) for(int i=0;i<n;i++)
#define loop(i,x,n) for(int i=x;i<n;i++)
#define pf push_front
#define pb push_back
#define int long long
using namespace std;
const int INF=1000000007;
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};
int ex[4]={1,-1,1,-1};
int ey[4]={1,1,-1,-1};
int fx[4]={2,0,-2,0};
int fy[4]={0,2,0,-2};

int mp[20][20]={};

signed main(){
  int x,y,s;
  char z;
  while(cin>>x>>z>>y>>z>>s){
    if(s==1){
      mp[y][x]+=1;
      rep(i,4){
        if(y-dy[i]>=0&&x-dx[i]>=0){
          mp[y+dy[i]][x+dx[i]]+=1;
        }
      }
    }
    else if(s==2){
      mp[y][x]+=1;
      rep(i,4){
        if(y-dy[i]>=0&&x-dx[i]>=0){
          mp[y+dy[i]][x+dx[i]]+=1;
        }
        if(y-ey[i]>=0&&x-ex[i]>=0){
          mp[y+ey[i]][x+ex[i]]+=1;
        }
      }
    }
    else{
      mp[y][x]+=1;
      rep(i,4){
        if(y-dy[i]>=0&&x-dx[i]>=0){
          mp[y+dy[i]][x+dx[i]]+=1;
        }
        if(y-ey[i]>=0&&x-ex[i]>=0){
          mp[y+ey[i]][x+ex[i]]+=1;
        }
        if(y-fy[i]>=0&&x-fx[i]>=0){
          mp[y+fy[i]][x+fx[i]]+=1;
        }
      }
    }
  } 
  int ans1=0,ans2=0;
  rep(i,10){
    rep(j,10){
      if(mp[i][j]==0)ans1++;
      if(ans2<mp[i][j])ans2=mp[i][j];
    }
  }
  cout<<ans1<<endl;
  cout<<ans2<<endl;
  return 0;
}

C++: #include<iostream>
#include<algorithm>
using namespace std;
int main()
{
	int bigx[4] = { 0, 2, 0, -2 };
	int bigy[4] = { 2, 0, -2, 0 };
	int smx[4] = {0,1,0,-1};
	int smy[4] = {1,0,-1,0};
	int midx[9] = { -1, -1, 0, 1, 1,  1,  0, -1 };
	int midy[9] = {  0,  1, 1, 1, 0, -1, -1, -1 };
	int map[10][10] = { 0 };
	int cnt = 100;
	int x, y, size;
	char s, d;
	int ma = 0;
	int c = 0;

	while (cin >> x >> s >> y >> d >> size){
		
		if (size == 1){
			map[x][y]++;
			for (int i = 0; i < 4; i++){
				
				int xx = smx[i] + x;
				int yy = smy[i] + y;
				if (xx >= 0 && xx < 10 && y >= 0 && y < 10){
					map[xx][yy]++;
				}
			}
		}

		else if (size == 2){
			map[x][y]++;
			for (int i = 0; i < 8; i++){
				int xx = midx[i] + x;
				int yy = midy[i] + y;
				if (xx >= 0 && xx < 10 && y >= 0 && y < 10){
					map[xx][yy]++;
				}
			}
		}

		else if(size==3) {
			map[x][y]++;
			for (int i = 0; i < 4; i++){
				int xx = bigx[i] + x;
				int yy = bigy[i] + y;
				if (xx >= 0 && xx < 10 && y >= 0 && y < 10){
					map[xx][yy]++;
				}
			}
			for (int i = 0; i < 8; i++){
				int xx = midx[i] + x;
				int yy = midy[i] + y;
				if (xx >= 0 && xx < 10 && y >= 0 && y < 10){
					map[xx][yy]++;
				}
			}
		}
	}
	/*for (int i = 0; i < 10; i++){
		for (int i2 = 0; i2 < 10; i2++){
			cout << map[i][i2] << " ";
			if (map[i][i2] != 0){
				cnt--;
			}
			ma = max(ma, map[i][i2]);
		}cout << endl;
	}*/
	cout << ma << endl;
	cout << cnt << endl;
}

C++: #include <iostream>
#include <vector>
#include <list>
#include <algorithm>
#include <set>
#include <queue>
#include <stack>
#include <string>
#include <sstream>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>

#define rep(i, n) for(int i = 0; i < n; i ++)
#define ITER(c) __typeof((c).begin())
#define each(c, it) for(ITER(c) it =(c).begin(); it!=(c).end(); it++)
#define ALL(c) c.begin(), c.end()
#define mp make_pair
#define pb push_back
#define MEMSET(v, h) memset((v), h, sizeof(v))
 
using namespace std; 

typedef pair<int, int> pii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<string> vs;

const int INF = 1 << 24;
const int N = 10;

const int S[][5] = {0, 0, 0, 0, 0,
                    0, 0, 1, 0, 0, 
                    0, 1, 1, 1, 0,
                    0, 0, 1, 0, 0,
                    0, 0, 0, 0, 0};

const int M[][5] = {0, 0, 0, 0, 0,
                    0, 1, 1, 1, 0,
                    0, 1, 1, 1, 0,
                    0, 1, 1, 1, 0,
                    0, 0, 0, 0, 0};

const int L[][5] = {0, 0, 1, 0, 0,
                    0, 1, 1, 1, 0,
                    1, 1, 1, 1, 1,
                    0, 1, 1, 1, 0,
                    0, 0, 1, 0, 0};

const int (*diff[3])[5] = {S, M, L};

int m[N][N] = { 0 };

int main(void){
    char c;
    for(int x, y, t; cin >> x >> c >> y >> c >> t;){
        x -= 2; y -= 2;
     
        rep(dy, 5) rep(dx, 5)
            if(0 <= x + dx && x + dx < N &&
               0 <= y + dy && y + dy < N)
                m[y + dy][x + dx] += diff[t - 1][dy][dx];
    }
 
    cout << count(&m[0][0], &m[0][0] + N * N, 0) << endl << *max_element(&m[0][0], &m[0][0] + N * N) << endl;
    return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;

int paper[11][11]={0};
int dx[3][14]={{0,-1,0,1,0},
               {-1,0,1,-1,0,1,-1,0,1},
               {0,-1,0,1,-2,-1,0,1,2,-1,0,1,0}};
int dy[3][14]={{1,0,0,0,-1},
               {1,1,1,0,0,0,-1,-1,-1},
               {2,1,1,1,0,0,0,0,0,-1,-1,-1,-2}};
int size[3]={5,9,13};

int main(){
    int x, y, s;
    while(scanf("%d,%d,%d",&x,&y,&s) != EOF){
        for(int i=0;i<size[s-1];++i){
            if(x+dx[s-1][i] >= 0 && x+dx[s-1][i] < 10
                    && y+dy[s-1][i] >= 0 && y+dy[s-1][i] < 10){
                paper[y+dy[s-1][i]][x+dx[s-1][i]]++;
            }
        }
    }
    int white=0, maxi=0;
    for(int i=0;i<10;++i){
        for(int j=0;j<10;++j){
            if(paper[i][j] == 0)white++;
            maxi = max(maxi, paper[i][j]);
        }
    }
    cout << white << endl << maxi << endl;

    return 0;
}