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)
}

Python: while True:
    H = int(input())
    if H==0:
        exit()
    board = [[0]*5 for _ in range(H+1)]
    for i in range(1,H+1):
        board[i] = list(map(int, input().split()))
    board = board[::-1]
    change = True
    score = 0
    while change==True:
        change = False
        for i in range(H-1,-1,-1):
            if len(set(board[i]))==1 and board[i][0]>0:
                score += sum(board[i])
                change = True
                for j in range(i,H):
                    board[j] = board[j+1]
            elif len(set(board[i][:4]))==1 and board[i][:4][0]>0:
                score += sum(board[i][:4])
                change = True
                for j in range(i,H):
                    board[j][:4] = board[j+1][:4]
            elif len(set(board[i][1:]))==1 and board[i][1:][0]>0:
                score += sum(board[i][1:])
                change = True
                for j in range(i,H):
                    board[j][1:] = board[j+1][1:]
            elif len(set(board[i][:3]))==1 and board[i][:3][0]>0:
                score += sum(board[i][:3])
                change = True
                for j in range(i,H):
                    board[j][:3] = board[j+1][:3]
            elif len(set(board[i][1:4]))==1 and board[i][1:4][0]>0:
                score += sum(board[i][1:4])
                change = True
                for j in range(i,H):
                    board[j][1:4] = board[j+1][1:4]
            elif len(set(board[i][2:]))==1 and board[i][2:][0]>0:
                score += sum(board[i][2:])
                change = True
                for j in range(i,H):
                    board[j][2:] = board[j+1][2:]
    print(score)

Python: 
while True:
    h = int(input())
    if h == 0:
        break
    stones = [list() for i in range(h)]
    for i in range(h):
        stones[i] = list(map(int, input().split()))
    ans = 0
    while True:
        # 石を消してスコアを計算
        tmp = 0
        for y in range(h):
            for j in range(3):
                num = stones[y][j]
                count = 0
                for k in range(j, 5):
                    if num == stones[y][k]:
                        count += 1
                    else:
                        break
                if count >= 3:
                    for k in range(j, j+count):
                        stones[y][k] = 0
                    tmp += count * num
                    break
        if tmp == 0:
            break
        ans += tmp
        # 石を落下させる
        for x in range(5):
            settle = h-1
            for y in range(h-1, -1, -1):
                if stones[y][x] != 0:
                    tmp = stones[y][x]
                    stones[y][x] = 0
                    stones[settle][x] = tmp
                    settle -= 1
    print(ans)

Python: class Game:
    def __init__(self, mp, height):
        self.mp = mp
        self.height = height
        self.score = 0
        self.erase_flag = False

    def erase(self):
        for y in range(self.height):
            line = self.mp[y]
            new_line, add_score = self.fix(line)
            self.mp[y] = new_line
            self.score += add_score
            if add_score != 0:self.erase_flag = True

    def fix(self, line):
        add_score = 0
        new_line = line
        for length in range(5, 2, -1):
            for left in range(5 - length + 1):
                if all(map(lambda x:x==line[left], line[left:left+length])):
                    add_score = line[left] * length
                    new_line = line[:left] + [0] * length + line[left+length:]
                    return new_line, add_score
        return new_line, add_score

    def fall(self):
        for x in range(5):
            col = []
            for y in range(self.height):
                if self.mp[y][x] != 0:
                    col.append(self.mp[y][x])
            col = [0] * (self.height - len(col)) + col
            for y in range(self.height):
                self.mp[y][x] = col[y]

    def run(self):
        while True:
            self.erase_flag = False
            self.erase()
            if not self.erase_flag:break
            self.fall()

    def print_state(self):
        print(*self.mp, sep="\n")
        print(self.score)


while True:
    h = int(input())
    if h == 0:break
    mp = [list(map(int, input().split())) for _ in range(h)]
    game = Game(mp, h)
    game.run()
    print(game.score)