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>
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][4]==m&&S[y][3]==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;
	}

C++: #include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(long long int i=0;i<n;++i)
typedef long long int ll;

bool check(vector<int> a,int l,int r){
    for(int i=l+1;i<=r;i++){
        if(a[l]!=a[i]){
            return false;
        }
    }
    return true;
}

int main(){

    while(1){
        int h;
        cin >> h;
        if(h==0){
            break;
        }
        vector<vector<int>> m(h+1,vector<int>(6,0));
        for(int i=1;i<=h;i++){
            for(int j=0;j<5;j++){
                cin >> m[i][j];
            }
        }
        int ans=0;
        while(1){
            int at=ans;
            for(int i=1;i<=h;i++){
                bool f=false;
                int tt=0;
                for(int j=0;j<3;j++){
                    for(int k=4;k>j+1;k--){
                        f=check(m[i],j,k);
                        if(f){
                            tt+=m[i][j]*(k-j+1);
                            for(int l=j;l<=k;l++){
                                m[i][l]=0;
                            }
                            break;
                        }
                    }
                    if(f)break;
                }
                at+=tt;
            }
            // for(int i=0;i<=h;i++){
            //     for(int j=0;j<=5;j++){
            //         cout << m[i][j] << " " ;
            //     }cout << endl;
            // }cout << endl;
            if(at==ans){
                cout << ans << endl;
                break;
            }
            ans=at;
            vector<vector<int>> tt(m);
            while(1){
                for(int i=0;i<5;i++){
                    for(int j=h;j>0;j--){
                        if(m[j][i]==0){
                            for(int k=j;k>0;k--){
                                m[k][i]=m[k-1][i];
                            }
                        }
                    }
                }
                if(m==tt){
                    break;
                }else{
                    tt=m;
                }
            }
            // for(int i=1;i<=h;i++){
            //     for(int j=0;j<5;j++){
            //         cout << m[i][j] << " " ;
            //     }cout << endl;
            // }cout << endl;
        }
    }

    return 0;
}