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<bits/stdc++.h>

using namespace std;
#define REP(i,n) for(int i = 0;i < n ;++i)

int tile[11][5];

int main()
{
  int h;

  while(cin >> h,h){
    REP(i,11)REP(j,5){
      tile[i][j] = -1;
    }
    REP(i,h)REP(j,5){
      cin >> tile[h-1-i][j];
    }
    int ans = 0;
    bool update = false;
    while(true){
      update = false;
      REP(it,11){
        bool t1 = tile[it][0] == tile[it][1] && tile[it][0] != -1; 
        bool t2 = tile[it][1] == tile[it][2] && tile[it][1] != -1; 
        bool t3 = tile[it][2] == tile[it][3] && tile[it][2] != -1; 
        bool t4 = tile[it][3] == tile[it][4] && tile[it][3] != -1; 
        bool y1 = t1 && t2;
        bool y2 = t2 && t3;
        bool y3 = t3 && t4;
        if(y1 && y2 && y3){
          ans += tile[it][0]*5;
          REP(i,5){
            tile[it][i]=-1;
          }
          update = true;
        }
        else if(y1 && y2 || y2 && y3){
          ans += tile[it][y3]*4;
          REP(i,4){
            tile[it][i + y3]=-1;
          }
          update = true;
        }
        else if(y1 || y2 || y3){
          ans += tile[it][2]*3;
          REP(i,3){
            tile[it][i + y2 + ((int)y3)*2] = -1;
          }
          update =true;
        }
      }
      REP(it,10){
        REP(i,5){
          if(tile[it][i] == -1){
            int itt = it;
            while(tile[++itt][i] == -1 && itt != 10);
            swap(tile[it][i],tile[itt][i]);
          }
        }
      }
    if(!update)break;
    }
    cout << ans << endl;
  }
}

C++: #include <bits/stdc++.h>

using namespace std;

int h, ans;
int a[10][5];

bool change(void) {
  bool res = true;
  for (int i = 0; i < h; i++) {
    int l = 0, r = 0;
    while (l < 5) {
      while (r + 1 < 5 && a[i][r] > 0 && a[i][r] == a[i][r + 1]) r++;
      if (r - l + 1 >= 3) {
        ans += a[i][l] * (r - l + 1);
        for (int j = l; j <= r; j++) {
          a[i][j] = -1;
        }
        res &= false;
      }
      l = ++r;
    }
  }
  return res;
}

int main(void) {
  while (cin >> h, h) {
    for (int i = 0; i < h; i++) {
      for (int j = 0; j < 5; j++) {
        cin >> a[i][j];
      }
    }

    ans = 0;
    while (true) {
      if (change()) break;
      for (int i = 0; i < 5; i++) {
        for (int j = h - 1; j >= 0; j--) {
          if (a[j][i] > 0) continue;
          int s = j;
          while (s >= 0 && a[s][i] < 0) s--;
          if (s < 0) break;
          while (++s <= j) swap(a[s - 1][i], a[s][i]);
        }
      }
    }

    cout << ans << endl;
  }

  return 0;
}

C++: #include<iostream>

using namespace std;

void swap(int *a,int *b){
	int tmp = *a;
	*a = *b;
	*b = tmp;
}

int main(){

	int data[10][10];

	int h;

	while(cin>>h){
		if(h==0)break;

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

		int ans=0;
		while(1){
			int flag=0;
			for(int i=0;i<h;i++){
				for(int j=0;j<5;j++){
					if(data[i][j]==0)continue;
					int num = data[i][j];
					int cnt=1;

					for(int k=j+1;k<5;k++){
						if(num==data[i][k]){
							cnt++;
						}
						else{
							break;
						}
					}
					if(cnt>=3){
					//	cout<<"unko"<<endl;
						for(int k=j;k<j+cnt;k++){
							data[i][k]=0;
						}
						ans+= cnt*num;
						flag=1;
					}
				}
			}

			/*
			for(int i=0;i<h;i++){
				for(int j=0;j<5;j++){
					cout<<data[i][j]<<" ";
				}
				cout<<endl;
			}

			*/
		//	cout<<endl<<endl;

			for(int i=h-2;i>=0;i--){
				for(int j=0;j<5;j++){
					if(data[i][j]!=0){
						int flag=1;
						for(int k=i+1;k<h;k++){
							if(data[k][j]==0){
								swap(&data[k][j],&data[k-1][j]);
								flag=0;
							}
						}
						if(flag==0){
							i=h-1;
							j=10;
						}
					}
				}
			}

			/*
			for(int i=0;i<h;i++){
				for(int j=0;j<5;j++){
					cout<<data[i][j]<<" ";
				}
				cout<<endl;
			}

			cout<<endl<<endl;
			*/


			if(flag==0)break;
		}

		cout<<ans<<endl;
	}
	return 0;
}