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()
{
    int h;

    while( cin >> h )
    {
        if( !h )
            break;

        int m[h][5];
        for( int i = 0; i < h; i++ )
            for( int j = 0; j < 5; j++ )
                cin >> m[i][j];

        int sum = 0, cnt = 20;
        while( cnt-- )
        {
            for( int i = 0; i < h; i++ )
            {
                if( m[i][0] == m[i][1] && m[i][1] == m[i][2] && m[i][2] == m[i][3] && m[i][3] == m[i][4] )
                {
                    sum += m[i][0] * 5;
                    for( int j = 0; j < 5; j++ )
                        m[i][j] = 0;
                }
                else if(  m[i][0] == m[i][1] && m[i][2] == m[i][3] && m[i][0] == m[i][2] )
                {
                    sum += m[i][0] * 4;
                    for( int j = 0; j < 4; j++ )
                        m[i][j] = 0;
                }
                else if( m[i][1] == m[i][2] && m[i][3] == m[i][4] && m[i][1] == m[i][3] )
                {
                    sum += m[i][1] * 4;
                    for( int j = 1; j < 5; j++ )
                        m[i][j] = 0;
                }
                else if( m[i][1] == m[i][2] && m[i][3] == m[i][2] )
                {
                    sum += m[i][2] * 3;
                    for( int j = 1; j < 4; j++ )
                        m[i][j] = 0;
                }
                else if( m[i][0] == m[i][1] && m[i][0] == m[i][2] )
                {
                    sum += m[i][2] * 3;
                    for( int j = 0; j < 3; j++ )
                        m[i][j] = 0;
                }
                else if( m[i][2] == m[i][3] && m[i][3] == m[i][4] )
                {
                    sum += m[i][2] * 3;
                    for( int j = 2; j < 5; j++ )
                        m[i][j] = 0;
                }
                else;
            }

            for( int i = 1; i < h; i++ )
            {
                for( int j = 0; j < 5; j++ )
                {
                    int k = i;
                    while( k && !m[k][j] )
                    {
                        m[k][j] = m[k-1][j];
                        m[k-1][j] = 0;
                        k--;
                    }
                }
            }
        }
        cout << sum << endl;
    }
    return 0;
}

C++: #include <iostream>
using namespace std;
int main(){

  int ban[10][5],add,result,did,h,i,j;

  while(cin>>h,h){
  result=0;
  for(i=0;i<h;i++) for(j=0;j<5;j++) cin>>ban[i][j];
  while(1){
  did=0;
  for(i=0;i<h;i++) for(j=0;j<3;j++){
      add=0;
      if(ban[i][j]!=0&&ban[i][j]==ban[i][j+1]&&ban[i][j]==ban[i][j+2]){
        if(j+3<5) if(ban[i][j]==ban[i][j+3]){
            add++;
            ban[i][j+3]=0;
            if(j+4<5) if(ban[i][j]==ban[i][j+4]){
                add++;
                ban[i][j+4]=0;
              }
          }
        add+=3;
        result+=ban[i][j]*add;
        ban[i][j]=ban[i][j+1]=ban[i][j+2]=0;
        did++;
      }
    }

  if(did!=0){
    for(int k=0;k<10;k++) for(i=h-1;i!=0;i--) for(j=0;j<5;j++) if(ban[i][j]==0){
          ban[i][j]=ban[i-1][j];
          ban[i-1][j]=0;
        }
  } else break;

  }

  cout<<result<<endl;

  }
  return 0;
 
}