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 <string>
#include <cstdlib>
#include <cmath>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <functional>
#include <bitset>
#include <assert.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<char> vc;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<double> vd;
typedef pair<ll,ll> P;
typedef vector<P> vpl;
typedef tuple<ll,ll,ll> tapu;
#define rep(i,n) for(ll i=0; i<(n); i++)
#define REP(i,a,b) for(int i=(a); i<(b); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
const int inf = 1<<30;
const ll linf = 1LL<<62;
const int MAX = 510000;
ll dy[8] = {0,1,0,-1,1,-1,1,-1};
ll dx[8] = {1,0,-1,0,1,-1,-1,1};
const double pi = acos(-1);
const double eps = 1e-7;
template<typename T1,typename T2> inline bool chmin(T1 &a,T2 b){
	if(a>b){
		a = b; return true;
	}
	else return false;
}
template<typename T1,typename T2> inline bool chmax(T1 &a,T2 b){
	if(a<b){
		a = b; return true;
	}
	else return false;
}
template<typename T1,typename T2> inline void print2(T1 a, T2 b){cout << a << " " << b << "\n";}
template<typename T1,typename T2,typename T3> inline void print3(T1 a, T2 b, T3 c){
	cout << a << " " << b << " " << c << "\n";
}
const int mod = 1e9 + 7;
//const int mod = 998244353;

int main(){
	while(1){
		ll h; cin >> h;
		if(!h) break;
		ll w = 5;
		vvl a(h,vl(w));
		rep(i,h) rep(j,w) cin >> a[i][j];
		ll ans = 0;
		while(1){
			ll plus = 0;
			rep(i,h){
				rep(j,w){
					if(a[i][j] == -1) continue;
					ll t = j;
					while(t < w && a[i][t] == a[i][j]){
						t++;
					}
					if(t-j >= 3){
						REP(k,j,t) plus += a[i][k], a[i][k] = -1;
					}
				}
			}
			rep(j,w){
				ll modify = 0;
				for(ll i=h-1; i>=0; i--){
					if(a[i][j] == -1) modify++;
					else{
						if(modify){
							a[i+modify][j] = a[i][j];
							a[i][j] = -1;
						}
					}
				}
			}
			ans += plus;
			if(!plus) break;
		}
		cout << ans << endl;
	}
}

C++: #include <iostream>
#include <algorithm>
#include <vector>
using namespace std;


 int main(){
	 
	 int h;
	 while(1){
		 int p=0;
		 int flag=1;
		 int x;
		cin >> h;
		if(h == 0) break;
		vector<vector<int>> A(5);
		for(int j = h-1; j >= 0; j--){
			for(int i = 0; i< 5; i++){
				cin >> x;
				A[i].push_back(x);
			}
		}
		for(int i = 0; i< 5; i++){
			reverse(A[i].begin(), A[i].end());
			}


		while(1){
			int flag=0;
		for(int i = 0; i < h; i++){
			int count=0;
			int mem=-1;
			//一行の処理開始
			for(int j=0; j< 5;j++){
				if(mem==A[j][i]) count++;
				else {
					mem =A[j][i];
					count = 0;
				}
				if(count > 1) {
					A[j-2][i] +=10;
					A[j-1][i] +=10;
					A[j][i] +=10;
					if(mem!=0) flag =1;
				}
			}
			for(int k = 0; k < 5 ; k++){
				if(A[k][i] >=10){
					p += A[k][i]%10;
					A[k][i]=0;
				}
			}//一行の処理終了
		}
		for(int i= 0; i < 5 ; i++){
			vector<int> B(A[i]);
			int counter=0;
			for(int j = 0 ; j < h ; j++){
				if(B[j] !=0){
					A[i][counter] = B[j];
					counter+=1;
				}
			}
			for(;counter<h; counter++){
				A[i][counter] = 0;
			}
		} 
		if(flag == 0) break;
		}
		cout <<p <<endl;
	 }
		 



	return 0;
 }