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 <vector>
using namespace std;

int main()
{
	bool flag;
	int sum, H;
	while (cin >> H, H) {
		sum = 0;
		vector< vector<int> > a(5, vector<int>(H, 0));
		for (int j = 0; j < H; j++) {
			for (int i = 0; i < 5; i++) {
				cin >> a[i][j];
				sum += a[i][j];
			}
		}

		do {
			flag = false;
			for (int j = H - 1; j >= 0; j--) {
				for (int i = 0; i < 3; i++) {
					if (a[i][j] != 0 && a[i][j] == a[i + 1][j] && a[i][j] == a[i + 2][j]) {
						if (i <= 1 && a[i][j] == a[i + 3][j]) {
							if (i == 0 && a[i][j] == a[i + 4][j]) {
								a[i + 4][j] = 0;
							}
							a[i + 3][j] = 0;
						}
						a[i][j] = a[i + 1][j] = a[i + 2][j] = 0;
						flag = true;
					}
				}
			}
			for (int i = 0; i < 5; i++) {
				for (int j = 0; j < H - 1; j++) {
					if (a[i][j + 1] == 0 && a[i][j] != 0) {
						a[i][j + 1] = a[i][j];
						a[i][j] = 0;
						j = -1;
					}
				}
			}
		} while (flag);

		for (int j = 0; j < H; j++)
			for (int i = 0; i < 5; i++)
				sum -= a[i][j];
		cout << sum << endl;
	}
	return 0;
}

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

vector<vector<int>> board;
int H;


int solve(){
    int res = 0, look = 0, cnt = 0;
    for(int i=0; i<H; i++){
        for(int j=0; j<3; j++){
            look = board[i][j];
            cnt = 1;
            for(int k = j+1; k<5; k++){
                if(board[i][j] == board[i][k]) cnt++;
                else break;
            }
            if(cnt >= 3){
                res += look * cnt;
                for(int k=j, count=0; count < cnt; k++, count++){
                    board[i][k] = 0;
                }
                break;
            }
        }
    }
    return res;
}

void dump(){
    for(int i=H-1; i>-1; i--){
        for(int j=0; j<5; j++) {
            if(board[i][j] == 0) {
                for(int k=i-1; k>-1; k--) {
                    if(board[k][j] != 0){
                        board[i][j] = board[k][j];
                        board[k][j] = 0;
                        break;
                    }
                }
            }
        }
    }
}

int main(){
    int res,tmp;
    while(true){
        cin >> H;
        if(H==0) break;
        res = 0;
        board = vector<vector<int>>(H, vector<int>(5));
        for(int i = 0; i<H; i++){
            cin >> board[i][0] >> board[i][1] >> board[i][2] >> board[i][3] >> board[i][4];
        }

        while(true){
            tmp = solve();
            res += tmp;
            dump();
            if(tmp == 0) break;
        }
        cout << res << endl;
    }
}

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

int main()
{
           while(true){
                       int H;
                       cin >> H;

                     if(H==0)
                           break;

                     int S[10][5];
                     for(int y=0;y<H;y++)
                             for(int x=0;x<5;x++)
                                   cin >> S[y][x];

                      int sco =0;

                      while(true){
                              bool flg = false;

                            for(int y=0;y<H;y++){
                                  int m = S[y][2];
                                   if(m==0)
                                          continue;

                                    if(S[y][0]==m && S[y][1]==m){
                                          sco += m*3; S[y][0] =
S[y][1]=S[y][2]=0; flg =true;
                                         if(S[y][3]==m){
                                             sco += m;  S[y][3] =0;
                                      if(S[y][4]==m){
                                             sco += m;  S[y][4] =0;
                                     }
                                  }
                                 }
                  else if(S[y][1]==m && S[y][3]==m){
                       sco += m*3; S[y][1] = S[y][2]=S[y][3]=0; flg =true;
                           if(S[y][4]==m){
                             sco += m; S[y][4]=0;
                      }
                  }

                  else if(S[y][3]==m && S[y][4]==m){
                        sco += m*3; S[y][2] = S[y][3]=S[y][4]=0; flg =true;
                     }
                   }

              if(!flg)
                    break;

                for(int x=0;x<5;x++){
                       for(int y=H-1;y>=0;y--){
                             if(S[y][x]!=0)
                                continue;

                        for(int y2=y-1; y2>=0;y2--){
                             if(S[y2][x]!=0){
                                 S[y][x] = S[y2][x]; S[y2][x] =0; break;

                               }
                           }
                         }
                       }
                     }
            cout << sco <<endl;
         }
  return 0;


}