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;
using ll = int64_t;
template <typename T> using V = vector<T>;
template <typename T> using VV = V<V<T>>;
using PLL = pair<ll, ll>;
using PPLL = pair<PLL, PLL>;
//#define endl '\n';

int main() {
    ll W = 5;
    while(true) {
        ll H;
        cin >> H;
        if(!H) break;
        VV<ll> board(H, V<ll>(W));
        ll sum = 0;
        for(auto &v : board) {
            for(ll &e : v) {
                cin >> e;
                sum += e;
            }
        }
        while(true) {
            bool update = false;
            VV<bool> used(H, V<bool>(W, false));
            for(ll h = 0; h < H; h++) {
                for(ll l = 0; l < 5; l++) {
                    for(ll r = W - 1; r - l + 1 >= 3; r--) {
                        bool is_same = true;
                        for(ll i = l; i <= r - 1; i++) {
                            if(board[h][i] == -1 || board[h][i + 1] == -1 || board[h][i] != board[h][i + 1]) is_same = false;
                        }
                        if(!is_same) continue;
                        update = true;
                        for(ll i = l; i <= r; i++) used[h][i] = true;
                    }
                }
            }
            if(!update) break;
            for(ll h = 0; h < H; h++) {
                for(ll w = 0; w < W; w++) {
                    ll nw = w + 1;
                    while(nw < W && used[h][nw]) nw++;
                    break;
                }
            }
            VV<ll> nb(H, V<ll>(W, -1));
            for(ll h = 0; h < H; h++) {
                for(ll w = 0; w < W; w++) {
                    ll b = board[h][w];
                    if(b == -1) continue;
                    if(used[h][w]) continue;
                    ll cnt = 0;
                    for(ll dh = 1; h + dh < H; dh++) if(used[h + dh][w]) cnt++;
                    nb[h + cnt][w] = b;
                }
            }
            board = move(nb);
        }
        for(const auto &v : board) for(ll e : v) if(e != -1) sum -= e;
        cout << sum << endl;
    }
    return 0;
}

C++: #include <iostream>
using namespace std;
int main(){
  int h;
  while (cin>>h,h|h!=0){
    string temp;
    int board[h][6];
    for (int i=0;i<h;i++){
      cin>>board[i][0]>>board[i][1]>>board[i][2]>>board[i][3]>>board[i][4];
    }
    int num,count;
    int check=0;
    int score=0;
    while (1){
      check=score;
      for (int i=h-2;i>=0;i--){
	for (int j=0;j<5;j++){
	  for (int k=h-1;k>i;k--){
	    if (board[k][j]==0){
	      board[k][j]=board[i][j];
	      board[i][j]=0;
	      break;
	    }
	  }
	}
      }
      for (int i=0;i<h;i++){
	count=1;
	num=0;
	for (int j=0;j<5;j++){
	  if (board[i][j]==num){
	    count++;
	  }
	  else{
	    if (count>2)
	      break;
	    count=1;
	  }
	  num=board[i][j];
	}
	if (count<=2)
	  num=0;
	score=score+num*count;
	int ii=0;
	for (int j=0;j<5;j++){
	  if ((ii==count-1||j==4||board[i][j+1]==num)&&board[i][j]==num){
	    board[i][j]=0;
	    ii++;
	  }
	  if (ii==count)
	    break;
	}
      }
      /* for (int i=0;i<h;i++){
	for (int j=0;j<5;j++){
	  cout<<board[i][j]<<" ";
	}
	cout<<endl;
	}*/
      if (check==score){
	break;
      }
      // cout<<" "<<score<<endl;
    }

    cout<<score<<endl; 
  }
}

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

int main(){
  while(1){
    int N;
    cin >> N ;
    if(N==0){
      break;
    }
    int str[11][6]={0};
    for(int i=N-1;i>=0;i--){
      for(int j=0;j<5;j++){
        cin >> str[i][j];
      }
    }
    int score=0;
    for(int i=0;i<10;i++){
//    for(int q=0;q<N;q++){
//     for(int w=0;w<5;w++){
//       cout << str[q][w];
//     }
//     cout << endl;
//    }
//    cout << endl;
      for(int j=0;j<N;j++){
        int a=str[j][0];
        int ch=0;
        for(int k=0;k<=5;k++){
          if(a==str[j][k]&&a!=0){
            ch++;
          }else{
            if(ch>=3){
              for(int l=k-1;l>=k-ch;l--){
                score+=str[j][l];
                str[j][l]=0;
              }
              break;
            }else{
              a=str[j][k];
              ch=1;
            }
          }
        }
      }
      for(int j=0;j<N;j++){
        for(int k=0;k<N;k++){
          for(int l=0;l<5;l++){
            if(str[k][l]==0){
              str[k][l]=str[k+1][l];
              str[k+1][l]=0;
            }
          }
        }
      }
    }
//    for(int q=0;q<N;q++){
//     for(int w=0;w<5;w++){
//       cout << str[q][w];
//     }
//     cout << endl;
//    }
    cout << score << endl;
  }
}

C++: #include<bits/stdc++.h>
#define rep(i,n)for(int i=0;i<n;i++)
using namespace std;

int main() {
	int h;
	while (scanf("%d", &h), h) {
		vector<int>V[5];
		rep(i, h) {
			rep(j, 5) {
				int d; scanf("%d", &d);
				V[j].push_back(d);
			}
		}
		rep(i, 5)reverse(V[i].begin(), V[i].end());
		int ans = 0;
		bool update;
		do {
			update = false;
			rep(i, h) {
				rep(j, 3) {
					int k;
					for (k = 0; j + k<5 && V[j + k].size()>i&&V[j][i] == V[j + k][i]; k++);
					if (k >= 3) {
						update = true;
						ans += V[j][i]*k;
						rep(t, k)V[j + t][i] = 0;
					}
				}
			}
			rep(i, 5) {
				rep(j, V[i].size()) {
					if (!V[i][j]) {
						V[i].erase(V[i].begin() + j);
						j--;
					}
				}
			}
		} while (update);
		printf("%d\n", ans);
	}
}