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 <iostream>
#include <vector>
#include <algorithm>
#include <cstring>

using namespace std;

int sdy[]={-1,0,0,1};
int sdx[]={0,-1,1,0};
int mdy[]={0,0,0,-1,-1,-1,1,1,1};
int mdx[]={-1,0,1,-1,0,1,-1,0,1};
int ldy[]={0,0,0,-1,-1,-1,1,1,1,2,0,0,-2};
int ldx[]={-1,0,1,-1,0,1,-1,0,1,0,-2,2,0};


int main(){

	int field[10][10];
	memset(field,0,sizeof(field));

	int x,y,size;
	char cm;
	while(cin>>x>>cm>>y>>cm>>size){
		field[y][x]++;
		if(size==1){
			for(int i = 0; i < 4; i++){
				int py=y+sdy[i];
				int px=x+sdx[i];
				if(py>=0&&px>=0&&py<10&&px<10){
					field[py][px]++;
				}
			}
		}
		else if(size==2){
			for(int i = 0; i < 9; i++){
				int py=y+mdy[i];
				int px=x+mdx[i];
				if(py>=0&&px>=0&&py<10&&px<10){
					field[py][px]++;
				}
			}
		}
		else{
			for(int i = 0; i < 13; i++){
				int py=y+ldy[i];
				int px=x+ldx[i];
				if(py>=0&&px>=0&&py<10&&px<10){
					field[py][px]++;
				}
			}
		}
	}

	int maxConcentration=0;
	int cnt=0;
	for(int i = 0; i < 10; i++){
		for(int j = 0; j < 10; j++){
			if(field[i][j]==0)
				cnt++;
			maxConcentration=max(maxConcentration,field[i][j]);
		}
	}
	cout<<cnt<<endl;
	cout<<maxConcentration<<endl;

	return 0;
}

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

int f[10][10];
void solve(){

}
int dx[] = {1,0,-1,1,1,1,-1,-1,2,0,-2,0};
int dy[] = {0,1,0,-1,1,-1,1,-1,0,2,0,-2};
int cnt, d;
void ink(int x, int y, int s){
  for(int i = 0; i < 4*s; i++){
    int nx = dx[i] + x;
    int ny = dy[i] + y;
    if(nx < 0 || nx >= 10 || ny < 0 || ny >= 10)continue;  
    f[ny][nx]++;
    if(f[ny][nx] == 1)cnt++;
    d = max(d, f[ny][nx]);
  }
}
int main(){
  int x,y,size;
  cnt = d = 0;
  char c;
  memset(f, 0, sizeof(f));
  while(cin >> x >> c >> y >> c >> size){
    ink(x,y,size);
  }
  cout << 100 - cnt << endl << d << endl;
  return 0;
}

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

int main() {
	int x, y, size;
	int sol[10][10];
	char c;
	for(int i = 0; i < 10; i++) {
		for(int j = 0; j < 10; j++) {
			sol[i][j] = 0;
		}
	}
	while(cin >> x >> c >> y >> c >> size) {
		sol[x][y]++;
		if(x - 1 >= 0) sol[x-1][y]++;
		if(y - 1 >= 0) sol[x][y-1]++;
		if(x + 1 < 10) sol[x+1][y]++;
		if(y + 1 < 10) sol[x][y+1]++;
		if(size >= 2) {			
			if(x-1 >= 0 && y-1 >= 0) sol[x-1][y-1]++;
			if(x+1 < 10 && y-1 >= 0) sol[x+1][y-1]++;
			if(x-1 >= 0 && y+1 < 10) sol[x-1][y+1]++;
			if(x+1 < 10 && y+1 < 10) sol[x+1][y+1]++;
		}
		if(size == 3) {
			if(y - 2 >= 0) sol[x][y-2]++;
			if(y + 2 < 10) sol[x][y+2]++;
			if(x - 2 >= 0) sol[x-2][y]++;
			if(x + 2 < 10) sol[x+2][y]++; 
		}
		/*
		for(int i = 0; i < 10; i++) {
			for(int j = 0; j < 10; j++) {
				cout << sol[i][j] << " " ;
			}
			cout << endl;
		}
		*/
	}
	int count = 0;
	int max = 0;
	for(int i = 0; i < 10; i++) {
		for(int j = 0; j < 10; j++) {
			if(sol[i][j] == 0) count++;
			if(sol[i][j] > max) max = sol[i][j];
		}
	}
	cout << count << endl;
	cout << max << endl;
	return 0;
}

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

int map[10][10]={};
int sx[] = { 0,-1,1,0 } , sy[] = { -1,0,0,1 } ;
int mx[] = { -1,0,1 }, my[] = { -1,0,1 } ;
int lx[] = { 0,-1,0,1,-2,-1,1,2,-1,0,1,0 } ;
int ly[] = { -2,-1,-1,-1,0,0,0,0,1,1,1,2 } ;

int main(){
	
	int x,y,size ;
	char temp;
	int enpty=0,max=0;
	
	while(1){
		cin >> x ;
		if( cin.eof() ) break;
		cin >> temp >> y ;
		cin >> temp >> size ;
		
		map[x][y]++;
		
		if( size==1 ){
			for( int i=0 ; i<4 ; i++ ){
				if( x+sx[i]>=0 && x+sx[i]<=9 && y+sy[i]>=0 && y+sy[i]<=9 )
					map[x+sx[i]][y+sy[i]]++;
			}
		}
		else if( size==2 ){
			for( int i=0 ; i<9 ; i++ ){
				if( x+mx[i%3]>=0 && x+mx[i%3]<=9 && y+my[i/3]>=0 && y+my[i/3]<=9 )
					map[x+mx[i%3]][y+my[i/3]]++;
			}
		}
		else if( size==3 ){
			for( int i=0 ; i<12 ; i++ ){
				if( x+lx[i]>=0 && x+lx[i]<=9 && y+ly[i]>=0 && y+ly[i]<=9 )
					map[x+sx[i]][y+sy[i]]++;
			}
		}
	}
	
	for( int i=0 ; i<10 ; i++ ){
		for( int j=0 ; j<10 ; j++ ){
			if( map[i][j]==0 ) empty++;
			if( map[i][j]>max ) max=map[i][j] ;
		}
	}
	
	cout << empty << endl ;
	cout << max << endl ;
	
return 0;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
	int a[10][10]={},x,y,size,dumy=0,max=0,ans=0;
	int mx[12]={0,-1,1,0,-1,1,-1,1,0,-2,2,0},my[12]={-1,0,0,1,-1,-1,1,1,-2,0,0,2};
	while(scanf("%d,%d,%d",&x,&y,&size)!=EOF){
		dumy=4*size;
		//cout<<size<<endl;
		for(int i=0;i<dumy;i++){
			if(x+mx[i]>=0&&y+my[i]>=0)
			a[x+mx[i]][y+my[i]]++;
		}
	}
	for(int i=0;i<10;i++){
		for(int j=0;j<10;j++){
			if(a[i][j]==0){
				ans++;
			}else{
				if(max<=a[i][j])
				max=a[i][j];
			}
		}
	}
	cout<<ans<<endl<<max<<endl;
return 0;
}