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\n", count, max)
}

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

int main(int argc, char *argv[]) {
	vector<vector<int> > cell_list(10, vector<int>(10, 0));
	const int small_x[4] = {0, 1, 0, -1};
	const int small_y[4] = {-1, 0, 1, 0};
	const int middle_x[4] = {1, 1, -1, -1};
	const int middle_y[4] = {-1, 1, 1, -1};
	const int large_x[4] = {0, 2, 0, -2};
	const int large_y[4] = {2, 0, -2, 0};
	
	while (true) {
		int x, y, size;
		if (EOF == fscanf(stdin, "%d,%d,%d", &x, &y, &size)) {
			break;
		}
		// small
		for (int i = 0; i < 4; i++) {
			if (x+small_x[i] >= 0 && y+small_y[i] >= 0) {
				cell_list[y+small_y[i]][x+small_x[i]]++;
			}
		}
		// middle
		if (size > 1) {
			for (int i = 0; i < 4; i++) {
				if (x+middle_x[i] >= 0 && y+middle_y[i] >= 0) {
					cell_list[y+middle_y[i]][x+middle_x[i]]++;
				}
			}
			// large
			if (size > 2) {
				for (int i = 0; i < 4; i++) {
					if (x+large_x[i] >= 0 && y+large_y[i] >= 0) {
						cell_list[y+large_y[i]][x+large_x[i]]++;
					}
				}
			}
		}
	}
	
	// calc empty cell and max
	int sum_empty = 0, max = 0;
	for (int i = 0; i < 10; i++) {
		for (int j = 0; j < 10; j++) {
			if (cell_list[i][j] == 0) sum_empty++;
			if (cell_list[i][j] > max) max = cell_list[i][j];
		}
	}
	
	// print result
	printf("%d\n%d\n", sum_empty, max);
	return 0;
}

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

using namespace std;

#define LOG(...) printf(__VA_ARGS__)
//#define LOG(...)
#define FOR(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define REP(i,n) for(int i=0;i<(int)(n);++i)
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define RSORT(c) sort((c).rbegin(),(c).rend())
#define CLR(a) memset((a), 0 ,sizeof(a))

typedef long long ll;
typedef unsigned long long ull;
typedef vector<bool> vb;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vb> vvb;
typedef vector<vi> vvi;
typedef vector<vll> vvll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int dx[] = { -1, 0, 1, 0 }; const int dy[] = { 0, 1, 0, -1 };
const int dx2[] = { -1, -1, 1, 1 }; const int dy2[] = { -1, 1, 1, -1 };
int main() {
	char c;
	int cell[10][10]={0};
	int x, y, size;
	while (cin>>x>>c>>y>>c>>size){
		
		switch (size)
		{
		case 3:
			REP(i, 4){
				if (0 <= x + dx[i] * 2 && x + dx[i] * 2 <= 9 && 0 <= y + dy[i] * 2 && y + dy[i] * 2 <= 9)
					cell[x + dx[i] * 2][y + dy[i] * 2]++;
			}
		case 2:
			REP(i, 4){
				if (0 <= x + dx2[i]  && x + dx2[i]  <= 9 && 0 <= y + dy2[i]  && y + dy2[i]  <= 9)
					cell[x + dx2[i] ][y + dy2[i]]++;
			}
		case 1:
			REP(i, 4){
				if (0 <= x + dx[i] && x + dx[i] <= 9 && 0 <= y + dy[i] && y + dy[i] <= 9)
					cell[x + dx[i]][y + dy[i]]++;
			}
			break;
		}
	}
	int maxb=0;
	int count=0;
	REP(i,10){
		REP(j,10){
			if(cell[i][j]==0)
			count++;
			maxb=max(maxb,cell[i][j]);
		}
	}
	cout<<count<<endl<<maxb<<endl;
}

C++: #include <algorithm>
#include <vector>
#include <math.h>
#include <stdio.h>
#include <cctype>
#include <iostream>
#include <set>
#include <string>
#include <queue>
#include <map>
using namespace std;
int size(string x){
	string::size_type size=x.size();
	return size;
}
#define fu(l,k) for(int i=l;i<k;i++)
#define fd(l,k) for(int i=l;i>k;i--)
#define fi first
#define se second
typedef  vector<string> vs;
typedef  vector<int> vi;
double pi(){
	return M_PI;
}
typedef set<int> set_i;
typedef set<string> set_s;
int INF=1000000;
int main(){
	int dp[11][11]={};
	int x,y,ss;
	char s;
	while(cin>>x>>s>>y>>s>>ss){
		dp[x][y]++;
		if(ss==1){
			if(y-1>=0) dp[x][y-1]++;
			if(y+1<=9) dp[x][y+1]++;
			if(x-1>=0) dp[x-1][y]++;
			if(x+1<=9) dp[x+1][y]++;
		}
		if(ss==2){
			if(y-1>=0) dp[x][y-1]++;
			if(y+1<=9) dp[x][y+1]++;
			if(x-1>=0) dp[x-1][y]++;
			if(x+1<=9) dp[x+1][y]++;
			if(x-1>=0&&y-1>=0) dp[x-1][y-1]++;
			if(x+1<=9&&y-1>=0) dp[x+1][y-1]++;
			if(x-1>=0&&y+1<=9) dp[x-1][y+1]++;
			if(x+1<=9&&y+1<=9) dp[x+1][y+1]++;
		}
		if(ss==3){
			if(y-1>=0) dp[x][y-1]++;
			if(y+1<=9) dp[x][y+1]++;
			if(x-1>=0) dp[x-1][y]++;
			if(x+1<=9) dp[x+1][y]++;
			if(x-1>=0&&y-1>=0) dp[x-1][y-1]++;
			if(x+1<=9&&y-1>=0) dp[x+1][y-1]++;
			if(x-1>=0&&y+1<=9) dp[x-1][y+1]++;
			if(x+1<=9&&y+1<=9) dp[x+1][y+1]++;
			if(x+2<=9) dp[x+2][y]++;
			if(x-2>=0) dp[x-2][y]++;
			if(y+2<=9) dp[x][y+2]++;
			if(y-2>=0) dp[x][y-2]++;
		}
	}
	int ans=0,max=0;
	for(int a=0;a<10;a++){
		for(int b=0;b<10;b++){
			if(dp[a][b]==0) ans++;
			if(dp[a][b]>=max) max=dp[a][b];
		}
	}
	cout<<ans<<endl;
	cout<<max<<endl;
}