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>
using namespace std;

int main() {

  while( true ) {

    long long int h;
    cin >> h;
    if ( h == 0 ) break;

    vector< vector< long long int > > v;

    for ( long long int y = 0; y < h; y++ ) {

      vector< long long int > w;
      w.push_back( 0 );

      for ( long long int x = 0; x < 5; x++ ) {

	long long int in;
	cin >> in;
	w.push_back( in );

      }

      w.push_back( 0 );

      v.push_back( w );

    }

    long long int ans = 0;

    while( true ) {

      bool f = false;

      for ( long long int y = 0; y < h; y++ ) {

	long long int cnt = 0;
	long long int num = 0;

	for ( long long int x = 0; x < 7; x++ ) {

	  if ( v[y][x] != num ) {
	    if ( cnt >= 3 && num != 0 ) {
	      ans += cnt * num;
	      f = true;
	      for ( long long int k = 0; k < cnt; k++ ) {
		v[y][x-k-1] = 0;
	      }
	    }
	    cnt = 1;
	    num = v[y][x];
	  }else {
	    cnt++;
	  }

	}

      }

      if ( f == false ) {
	cout << ans << endl;
	break;
      }

      for ( long long int x = 1; x <= 5; x++ ) {

	long long int m = -1;

	for ( long long int y = h - 1; y >= 0; y-- ) {

	  if ( v[y][x] == 0 && m == -1 ) {
	    m = y;
	  }
	  if ( v[y][x] != 0 && m != -1 ) {
	    v[m][x] = v[y][x];
	    v[y][x] = 0;
	    m--;
	  }

	}

      }

    }

  }

  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][3]=S[y][1]=S[y][2]=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][3]=S[y][4]=S[y][2]=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++: // 2018/01/15 Tazoe

#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;
}