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: from functools import lru_cache


def DEBUG(*args): pass # print('@', *args)


@lru_cache(maxsize=None)
def pat(s, n):
    return ' '.join([s] * n)


DEBUG(pat('1', 3))


def removeAll(xs, s):
    while s in xs:
        xs.remove(s)
        xs.append('#')
    return xs


def lmap(f, s): return list(map(f, s))


digits = lmap(str, range(1, 10))

def main(n):
    data = '\n'.join(map(lambda x: input(), range(n)))
    score = 0
    DEBUG(data)
    while True:
        removed = False
        sum1 = sum(map(lambda x: 0 if x == '#' else int(x), data.split()))
        for d in digits:
            if pat(d, 3) in data:
                data = data.replace(pat(d, 5), pat('0', 5))
                data = data.replace(pat(d, 4), pat('0', 4))
                data = data.replace(pat(d, 3), pat('0', 3))
                removed = True
        if removed == False:
            break
        DEBUG(data)
        score += (sum1 - sum(map(lambda x: 0 if x == '#' else int(x), data.split())))
        data = zip(*map(lambda x: x.split(), data.split('\n')))
        data = map(lambda x: list(x[::-1]), data)
        data = map(lambda x: removeAll(x, '0'), data)
        data = lmap(lambda s: ' '.join(s), zip(*data))
        data = '\n'.join(data[::-1])
        DEBUG(data)
    DEBUG(data)
    print(score)

while True:
    n = int(input())
    if n == 0: break
    main(n)

Python: def calc(puzzle,H,score):
    flag=False
    for i in range(H-1,-1,-1):
        stones=[]
        for j in range(5):
            now=puzzle[j][i]
            if (len(stones)==0 or stones[-1]==now) and now!=0: stones.append(now)
            elif len(stones)<3: stones=[now]
        if len(stones)>2:
            flag=True
            score+=sum(stones)
            for j in range(5):
                if puzzle[j][i]==stones[0]: 
                    puzzle[j].pop(i)
                    puzzle[j].append(0)
    if flag==True:
        return calc(puzzle,H,score)
    else:
        return score

if __name__=="__main__":
    while True:
        score=0
        H=int(input())
        if H==0:
            break
        puzzle=[[] for _ in range(5)]
        for i in range(H):
            temp=list(map(int,input().split()))
            for j in range(5):
                puzzle[j].insert(0,temp[j])
        score=calc(puzzle,H,score)
        print(score)

Python: while True:
    H = int(input())
    if H == 0:  break

    score = 0
    game = [[None] * 5 for _ in range(H)]
    for i in reversed(range(H)):
        game[i] = [int(x) for x in input().split()]

    try_again = True
    while(try_again):
        # スコアを加算
        try_again = False
        for i in range(H):
            for j in range(3):
                if game[i][j] == None:  continue
                if game[i][j] == game[i][j + 1] == game[i][j + 2]:
                    try_again = True
                    num = game[i][j]
                    game[i][j] = game[i][j + 1] = game[i][j + 2] = None
                    score += 3 * num
                    for k in range(j + 3, 5):
                        if game[i][k] != num: break
                        game[i][k] = None
                        score += num
                    break

        # 石を落とす
        for i in range(1, H):
            for j in range(5):
                k = i
                while k > 0 and game[k - 1][j] == None:
                    k -= 1
                game[k][j], game[i][j] = game[i][j], game[k][j]

    print(score)