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<vector>
#include<stack>
#include<queue>
#include<cstdio>
#include<climits>
#include<cmath>
#include<cstring>
#include<string>
#include<complex>
#include<iomanip>
 
#define EPS (1e-10)
using namespace std;
#define PI (3.1415926535)
 
void c(int x, int y, int p[][10]){
	if(x >= 0 && x < 10){
		if(y >= 0 && y < 10){
			p[x][y]++;
		}
	}
}

int main(){
	int p[10][10] = {0};

	int x, y, size;

	while(scanf("%d,%d,%d", &x, &y, &size) != EOF){
		switch(size){
		case 1:
			for(int i = x-1; i <= x+1; i++){
				for(int j = y-1; j <= y+1; j++){
					int d = abs(i-x) + abs(j-y);
					if(d <= 1){
						c(i, j, p);
					}
				}
			}
			break;
		case 2:
			for(int i = x-1; i <= x+1; i++){
				for(int j = y-1; j <= y+1; j++){
					c(i, j, p);
				}
			}
			break;
		case 3:
			for(int i = x-2; i <= x+2; i++){
				for(int j = y-2; j <= y+2; j++){
					int d = abs(i-x) + abs(j-y);
					if(d <= 2){
						c(i, j, p);
					}
				}
			}			
		}
		//for(int i = 0; i < 10; i++){
		//	for(int j = 0; j < 10; j++){
		//		cout << p[j][i];
		//	}
		//	cout << endl;
		//}
	}

	int max = 0;
	int count = 0;
	for(int i = 0; i < 10; i++){
		for(int j = 0; j < 10; j++){
			if(p[i][j] > max){
				max = p[i][j];
			}
			if(p[i][j] == 0){
				count++;
			}
		}
	}

	cout << count << endl;
	cout << max << endl;

	return 0;
}

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

//4方向ベクトル→↑←↓
const int px[4] ={1,0,-1,0};
const int py[4] ={0,-1,0,1};

int board[15][15];
int x,y,size;
int ans1,ans2;
int main()
{
  ans1 = 0;
  for(int i = 0;i <10;i++){
    for(int j = 0;j < 10;j++){
      board[i][j] = 0;
    }
  }
  while(scanf("%d,%d,%d",&x,&y,&size) !=EOF){
    if(x <0||y < 0||x >10 ||y >10){
      continue;
    }
    if(size ==1){
      board[y][x] +=1;
      for(int j = 0;j < 4;j++){
	int nx = x + px[j];
	int ny = y + py[j];
	if(nx <0 ||ny < 0||nx > 10||ny >10)
	  continue;
	board[ny][nx] += 1;
      }
    }else if(size ==2){
      for(int i = -1;i <=1;i++){
	for(int j = -1;j <=1;j++){
	 int nx = x +j;
	 int ny = y +i;
	  if(nx <0 ||nx >=10||ny <0||ny >=10)
	    continue;
	  board[ny][nx] +=1;
	}
      }
    }else if(size ==3){
      for(int i = -2;i <=2;i++){
	for(int j = -2;j <=2;j++){
	  if(y +i<0||y+i >10||x +j < 0||x+j>10)
	    continue;
	  if(i == -2&&j ==0){
	    board[y+i][x] +=1;
	  }else if(i == -1&&(j !=-2&&j !=2)){
	    board[y+i][x+j] +=1;
	  }else if(i == 0){
	    
	    board[y+i][x+j] +=1;
	  }else if(i == 1&&(j !=-2&&j !=2)){
	    board[y+i][x+j] +=1;
	  }else if(i ==2&&j ==0){
	    board[y+i][x] +=1;
	  }
	}
      }
    }
  }
  ans2 = 0; 
  for(int i = 0;i <10;i++){
    for(int j = 0;j < 10;j++){
      if(board[i][j] == 0){
	ans1++;
      }
      if(board[i][j] > ans2){
	ans2 = board[i][j];
      }
    }
  }
  cout <<ans1<<endl;
  cout <<ans2<<endl;
  return 0;
}

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

int main(){
	string input;
	int mas[14][14];
	for(int i=0; i<14; i++){
		for(int j=0; j<14; j++){
			mas[i][j] = 0;
		}
	}
	int size1x[] = {-1, 0, 1, 0};	
	int size1y[] = {0, -1, 0, 1};	
	int size2x[] = {-1, 1, 1, -1};	
	int size2y[] = {-1, -1, 1, 1};	
	int size3x[] = {-2, 0, 2, 0};	
	int size3y[] = {0, -2, 0, 2};	
	while(cin>>input){
		int x, y, size;
		sscanf(input.c_str(), "%d,%d,%d", &x, &y, &size);
		x += 2;
		y += 2;
		mas[x][y]++;
		for(int i=0; i<4; i++){
			if(size >= 1) mas[x+size1x[i]][y+size1y[i]]++;
			if(size >= 2) mas[x+size2x[i]][y+size2y[i]]++;
			if(size >= 3) mas[x+size3x[i]][y+size3y[i]]++;
		}
		/* //ツデツバツッツグツ用
		for(int i=2; i<12; i++){
			for(int j=2; j<12; j++){
				cout<<mas[i][j];
			}
			cout<<endl;
		}
		cout<<endl;
		// */
	}
	int num = 100;
	int maxv = 0;
	for(int i=2; i<12; i++){
		for(int j=2; j<12; j++){
			if(mas[i][j]){
				num--;
				maxv = max(maxv, mas[i][j]);
			}
		}
	}
	cout<<num<<endl<<maxv<<endl;
	return 0;
}