Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()
	for {
		h := io.NextInt()
		if h == 0 {
			break
		}
		p := make([][]int, h)
		for i := 0; i < h; i++ {
			p[i] = make([]int, 5)
			for j := 0; j < 5; j++ {
				p[i][j] = io.NextInt()
			}
		}
		ans := 0
		for {
			sc := puyo(p, h)
			if sc == 0 {
				break
			}
			fall(p, h)
			ans += sc
		}
		io.Println(ans)
	}
}

func puyo(p [][]int, h int) int {
	sc := 0
	for i := 0; i < h; i++ {
		for j := 0; j < 3; j++ {
			var cnt int
			for cnt = 1; j+cnt < 5; cnt++ {
				if p[i][j] != p[i][j+cnt] {
					break
				}
			}
			if cnt > 2 {
				sc += p[i][j]*cnt
				for k := 0; k < cnt; k++ {
					p[i][j+k] = 0
				}
			}
		}
	}
	return sc
}

func fall(p [][]int, h int) {
	for j := 0; j < 5; j++ {
		for k := 1; k < h; k++ {
			for i := h - 1; i >= k; i-- {
				if p[i][j] == 0 {
					p[i][j] = p[i-1][j]
					p[i-1][j] = 0
				}
			}
		}
	}
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

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

int main()
{
  while(1){
    int H;
    cin >> H;
    if(H == 0) break;
    int p[H][5];
    int ans = 0;
    for(int i = 0; i < H; i++)
      for(int j = 0; j < 5; j++)
        cin >> p[i][j];
    bool flag = true;
    while(flag){
      flag = false;
      for(int i = 0; i < H; i++){
        int x = p[i][2];
        int n  = count(&p[i][0], &p[i + 1][0], x);
        if(x == -1) continue;
        if(n == 3){
          if(p[i][0] == x && p[i][1] == x){
            flag = true;
            ans += 3 * x;
            for(int j = 0; j < 3; j++)
              p[i][j] = -1;
          }else if(p[i][3] == x && p[i][4] == x){
            flag = true;
            ans += 3 * x;
            for(int j = 2; j < 5; j++)
              p[i][j] = -1;
          }else if(p[i][1] == x && p[i][3] == x){
            flag = true;
            ans += 3 * x;
            for(int j = 1; j < 4; j++)
              p[i][j] = -1;
          }
        }else if(n == 4){
          flag = true;
          ans += 4 * x;
          if(p[i][0] == x){
            for(int j = 0; j < 4; j++)
              p[i][j] = -1;
          }else{
            for(int j = 1; j < 5; j++)
              p[i][j] = -1;
          } 
        }else if(n == 5){
          flag = true;
          ans += 5 * x;
          for(int j = 0; j < 5; j++)
            p[i][j] = -1;
        }
      }
      for(int j = H - 1; j >= 0; j--){
        for(int k = 0; k < 5; k++){
          if(p[j][k] == -1){
            for(int l = j - 1; l >= 0; l--){
              if(p[l][k] != -1){
                swap(p[j][k], p[l][k]);
                break;
              }
            }
          }
        }
      }
    }
    cout << ans << endl;
  }

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>

using namespace std;

int main()
{
	int H,p,c,f,l,b; //p:point, c:check, f:flag, l:length
	int s[50];

	while(cin >> H){
		if(H==0){return 0;}

		p=0; b=-1;
		for(int i=0; i<50; i++){ s[i]=0;}
		for(int i=H-1; i>=0; i--){
			for(int j=0 ; j<5; j++){
				cin >> s[i*5+j];
			}
		}

		while(true){
			if(b==p){break;}
			b=p;
			for(int i=H-1; i>=0; i--){
				c=s[i*5+0]; l=1; f=0;
				for(int j=1 ; j<5; j++){
					if(c==s[i*5+j]){l++;}
					else if(l>=3){break;}
					else{ f=j; l=1; c=s[i*5+j];}
				}

				if(l>=3){
					for(int j=f ; j<l+f; j++){
						p+=s[i*5+j];
						s[i*5+j]=0;
					}
				}
			}

			for(int k=0; k<H-1; k++){		
				for(int i=H-1; i>0; i--){
					for(int j=0 ; j<5; j++){
						if(s[(i-1)*5+j]==0){
							s[(i-1)*5+j]=s[i*5+j];
							s[i*5+j]=0;
						}
					}
				}	
			}
		}
		cout << p << endl;
	}
}

C++: #include<bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define REP(i,n) for(int i=0;i<(int)(n);i++)
 
 
int main()
{
    int h;
    while(1==1)
    {
        scanf("%d\n",&h);
        if(h==0)break;
        int ban[15][5]={};
        int del=0;
        long int ans=0;
        REP(y,h)REP(x,5)scanf("%d ",&ban[y][x]);
        do{
            del=0;
            REP(y,h)
            {
                int center=ban[y][2];
                int centnum=1;
                if(ban[y][1]==center)
                {
                    centnum++;
                    if(ban[y][0]==center)centnum++;
                }
                if(ban[y][3]==center)
                {
                    centnum++;
                    if(ban[y][4]==center)centnum++;
                }
                if(centnum>=3 && center!=0)
                {
                    ban[y][2]=0;
                    if(ban[y][1]==center)
                    {
                        ban[y][1]=0;
                        if(ban[y][0]==center)ban[y][0]=0;
                    }
                    if(ban[y][3]==center)
                    {
                        ban[y][3]=0;
                        if(ban[y][4]==center)ban[y][4]=0;
                    }
                    ans+=centnum*center;
                    del++;
                }
            }
            REP(x,5)REP(i,1000)REP(y,h-1)if(ban[y][x]!=0&&ban[y+1][x]==0)swap(ban[y][x],ban[y+1][x]);
            /*
            REP(y,h)
            {
                REP(x,5)
                {
                    printf("%d ",ban[y][x]);
                }
                printf("\n");
            }
            printf("###\n");
            */
        }while(del>0);
        printf("%ld\n",ans);
    }
    return 0;
}