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 (1){
		cin >> h;
		if (h == 0){
			return 0;
		}
		//?????¢??????
		int board[10][5] = { -1 };
		for (int i = 0; i < h; i++){
			for (int j = 0; j < 5; j++){
				cin >> board[i][j];
			}
		}

		bool flg = 1; //??°???????????????
		int points = 0; //????¨????
		while (flg){
			flg = 0;

			//????????????????¶????&?¶??????????????????°?¨????
			for (int i = 0; i < h; i++){
				int start = -1; //??£?¶?????????????????§???????
				int end = -1; //??£?¶?????????????????????????

				for (int j = 1; j < 4; j++){
					//??°??????0??\??????3?????\?????£?¶????????????????????????¢???
					if (board[i][j] > 0){
						if (board[i][j - 1] == board[i][j] && board[i][j] == board[i][j + 1]){
							if (start < 0){
								start = j - 1;
							}
							end = j + 1;
							flg = 1;
						}
					}
				}
				
				if (flg){
					//?????°?¨????
					if (start >= 0 && end >= 0){
						points += (end - start + 1) * board[i][start];
						//????????????????????????????¶????(0?????????)
						for (int j = start; j <= end; j++){
							board[i][j] = 0;
						}
					}
				}
			}
			//?????????????????°??????
			if (flg){
				for (int i = 0; i < h - 1;i++){
					for (int j = 0; j < 5; j++){
						if (board[i+1][j] == 0){
							for (int x = i; x >= 0; x--){
								if (board[x][j] != 0){
									board[x + 1][j] = board[x][j];
									board[x][j] = 0;
								}
							}
						}
					}
				}
			}
		}
		cout << points << endl;
	}
	return 0;
}

C++: //莉頑律縺ョ謌先棡*AOJ0027*AOJ0028


#include<iostream>
#include<string>
#include<vector>
#include<cstdio>
#include<sstream>
#include<algorithm>
#include<cmath>
#include<map>
using namespace std;
int stoi(string x){stringstream ss;ss<<x;int tmp;ss>>tmp;return tmp;}
string itos(int x){stringstream ss;ss<<x;return ss.str();}
int main(){
	
	int h,ans=0;
	while(true){
	cin>>h;
	if(h==0)break;
	ans=0;
	int ta[200][5]={{0},{0}};
	for(int i=0;i<h;i++)for(int j=0;j<5;j++)cin>>ta[i][j];
	//逶、髱「縺ョ蟄伜惠縺励↑縺?→縺薙ｍ縺ッ0
	while(true){

	bool f=1;
	for(int i=0;i<h;i++){
	int cnt=0,fi=-1;
		for(int j=0;j<3;j++){
			if(ta[i][j]==ta[i][j+1]&&ta[i][j]==ta[i][j+2]&&ta[i][j]!=0){
			cnt++;
			if(fi==-1)fi=j;
			}
		}//endfor
		if(cnt!=0)ans+=ta[i][fi]*(2+cnt),f=0;
		if(cnt!=0)for(int j=0;j<2+cnt;j++)ta[i][fi+j]=0;
	}//endfor
	if(f)break;
	//關ス縺ィ縺吝?逅?	for(int i=h-2;i>=0;i--){
		for(int j=0;j<5;j++){
			int ti=i;
			while(true){
			if(ti==h-1||ta[ti+1][j]!=0)break;
			ta[ti+1][j]=ta[ti][j];
			ta[ti][j]=0;
			ti++;
			}//endwhile
		}//endfor
	}//endfor
	//for(int i=0;i<h;i++)printf("%d%d%d%d%d\n",ta[i][0],ta[i][1],ta[i][2],ta[i][3],ta[i][4]);
	//printf("\n");
	}//endwhile
	cout<<ans<<endl;
	}//endwhile
	return 0;
}

C++: #include <iostream>
#include <algorithm>

using namespace std;

int stage[10][5];

void downstone(int h){
	for(int i=h-1;i>=0;--i){
		for(int j=0;j<5;++j){
			if(stage[i][j]==0){
				for(int k=i-1;k>=0;k--){
					if(stage[k][j]){
						swap(stage[k][j],stage[i][j]);
						break;
					}
				}
			}
		}
	}
	return;
}

int deletestone(int h){
	int res=0;
	for(int i=h-1;i>=0;--i){
		for(int j=0;j<5;++j){
			int len=0;
			for(int k=j;k<5;++k){
				if(stage[i][j]==stage[i][k]) len++;
				else break;
			}
			if(len>=3){
				res+=stage[i][j]*len;
				for(int k=0;k<len;++k) stage[i][j+k]=0;
				break;
			}
		}
	}
	return res;
}

void show(int h){
	for(int i=0;i<h;++i){
		for(int j=0;j<5;++j) cout << stage[i][j] << " " ;
		cout << endl;
	}
	cout << endl;
}

int main(void){
	int h;
	while(cin>>h){
		if(h==0)
			break;
		for(int i=0;i<h;++i)for(int j=0;j<5;++j) cin >> stage[i][j];
		int ans=0;
		while(1){
			int cur=deletestone(h);
			if(cur==0) break;
			ans+=cur;
			//show(h);
			downstone(h);
			//show(h);
		}
		cout << ans << endl;
	}
	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> mp;
ll inf =  1e9;


int main(){
 while(1){
  ll h;
  cin>>h;
  if( h==0 ) break;
  vector<vector<ll> > a(h,vector<ll>(5,0) );
  for(ll i=h-1;i>=0;i--)
   for(ll j=0;j<5;j++) cin>>a[i][j];

  ll res = 0;
  bool flag = true;
  while(flag){
   flag = false;
   for(ll i=0;i<h;i++){
    ll num = a[i][0];
    ll cnt = 1;
    for(ll j=1;j<5;j++){
     if( num == a[i][j] ){
      cnt++;
      if( cnt >= 3 && num != 0){
       if(cnt == 3 ){
	res += num*2;
	a[i][j-1] = a[i][j-2] = 0;
	flag = true;
       }
       a[i][j] = 0;
       res += num;
      }

     }else{
      cnt = 1;
      num = a[i][j];
     }
    }
   }
 /*
   cout<<"before"<<endl;
   for(ll i=h-1;i>=0;i--){
    for(ll j=0;j<5;j++)cout<<a[i][j]<<' ';
    cout<<endl;
   }
  cout<<endl;
*/


   if( flag )
    for(ll i=h-1;i>=0;i--){
     for(ll j=0;j<5;j++){
      if(a[i][j] == 0 ){
       //for(ll k=i+1;k<h;k++) swap( a[k-1][j] , a[k][j] );
       for(ll k=i+1;k<h;k++) a[k-1][j] = a[k][j];
       a[h-1][j] = 0;
      }
     }
    }
  /* cout<<"after"<<endl;
   for(ll i=h-1;i>=0;i--){
    for(ll j=0;j<5;j++)cout<<a[i][j]<<' ';
    cout<<endl;
   }
  cout<<endl;
*/

  }
/*
  for(ll i=h-1;i>=0;i--){
   for(ll j=0;j<5;j++)cout<<a[i][j]<<' ';
   cout<<endl;
  }
  */
  cout<<res<<endl;
 }
    return 0;
}