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>
#include <algorithm>
using namespace std;
int map[60][5];
int main(void) {
	vector<int> list;
	for (;;) {
		int  h,score=0;
		cin >> h;
		if (!h)return 0;
		int cnt = 1;
		for (int i = 0; i < h; i++) {
			for (int j = 0; j < 5; j++) {
				cin >> map[i][j];
			}
		}
		bool update = true;
		for (; update;) {
			update = false;
			for (int i = 0; i < h; i++) {
				int pos = 0, num = 0, cnt = 0;
				for (int j = 0; j < 5; j++) {
					if (num != map[i][j]) {
						if (cnt > 2 && num) {
							for (int j = pos; j < pos + cnt; j++) {
								map[i][j] = 0;
							}
							score += num*cnt;
							update = true;
						}
						pos = j;
						num = map[i][j];
						cnt = 1;
					}
					else cnt++;
				}
				if (cnt > 2 && num) {
					for (int j = pos; j < pos + cnt ; j++) {
						map[i][j] = 0;
					}
					score += num*cnt;
					update = true;
				}
			}
			for (int j = 0; j < 5; j++) {
				int pos = h - 1;
				for (int i = h - 1; i >= 0; i--) {
					if (map[i][j]) {
						map[pos][j] = map[i][j];
						if (pos != i)map[i][j] = 0;
						pos--;
					}
				}
			}
		}
		cout << score << endl;
	}
	return 0;
}

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;
}