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 <stdio.h>

void partical_move(int data[][5], int i, int n) {
  int j, k;
  for (j = n-1; j >= 0; j--) {
	if (data[j][i] == 0) {
	  for (k = j; k >= 0; k--) {
		if (data[k][i] != 0) {
		  data[j][i] = data[k][i];
		  data[k][i] = 0;
		  break;
		}
	  }
	}
  }
}

int main(void) {
  int n;
  int data[100][5] = {{0}};
  int flag = 0;
  int i, j, k;
  int score[100] = {0};
  int L = 0;

  while (1) {
	scanf("%d", &n);
	if (n == 0) break;
	for (i = 0; i < n; i++) {
	  for (j = 0; j < 5; j++) {
		scanf("%d", &data[i][j]);
	  }
	}
	while (1) {
	  //debug
	  // 	puts("");
	  // for (i = 0; i < n; i++) {
	  // 	for (j = 0; j < 5; j++) {
	  // 	  printf("%d ", data[i][j]);
	  // 	}
	  // 	puts("");
	  // }
	  //
	  flag = 0;
	  for (i = 0; i < n; i++) {
		if (data[i][0] == data[i][1] && data[i][1] == data[i][2] && 
			data[i][2] == data[i][3] && data[i][3] == data[i][4] && data[i][2] != 0) {
		  score[L] += data[i][0]*5;

		  data[i][0] = data[i][1] = data[i][2] = data[i][3] = data[i][4] = 0; //delete

		  flag = 1;
		}

		else if (( (data[i][0] == data[i][1] && data[i][1] == data[i][2] && data[i][2] == data[i][3]) && data[i][2] != 0) ||
				 ((data[i][1] == data[i][2] && data[i][2] == data[i][3] && data[i][3] == data[i][4]) && (data[i][2] != 0))) {
		  score[L] += data[i][2]*4;

		  if (data[i][0] == data[i][1]) { //delete
			data[i][0] = data[i][1] = data[i][2] = data[i][3] = 0; //delete
		  } //delete
		  else { //delete
			data[i][1] = data[i][2] = data[i][3] = data[i][4] = 0; //delete
		  } //delete

		  flag = 1;
		}

		else {
		  for (j = 0; j < 3; j++) {
			if (data[i][j] == data[i][j+1] && data[i][j+1] == data[i][j+2] && data[i][j] != 0) {
			  score[L] += data[i][j]*3;

			  for (k = j; k < j+3; k++) { //delete
				data[i][k] = 0; //delete
			  } //delete

			  flag = 1;
			  break;
			}
		  }
		}
	  }

	  ///////////////////debug///////////////////////////
	  // puts("");
	  // for (i = 0; i < n; i++) {
	  // 	for (j = 0; j < 5; j++) {
	  // 	  printf("%d ", data[i][j]);
	  // 	}
	  // 	puts("");
	  // }
	  ///////////////////////////////////////////////////

	  if (flag == 0) {
		  puts("");
		for (i = 0; i < n; i++) {
		  for (j = 0; j < 5; j++) {
			printf("%d ", data[i][j]);
		  }
		  puts("");
		}
		//		printf("%d\n",score[L]);
		L++;
		break;
	  }
	  //move

	  for (i = 0; i < 5; i++) { //列五行分探索
		partical_move(data,i, n); 
	  }
	}//while



	// printf("%d\n",data[l]);
  }//while

  for (i = 0; i < L; i++) {
	printf("%d\n",score[i]);
  }
}//mdatain

C++: #include <bits/stdc++.h>
#define PB push_back
#define MP make_pair
#define REP(i,n) for (int i=0;i<(n);i++)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define ALL(a) (a).begin(),(a).end()
#define MOD 100000
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
const int INF=1e9;
int H;
int fld[5][10];
void drop(){
      REP(i,5){
            REP(j,H){
                  if(fld[i][j]==-1){
                        for(int k=j;k<H;k++){
                              if(fld[i][k]!=-1){
                                    int tmp=fld[i][k];
                                    fld[i][k]=fld[i][j];
                                    fld[i][j]=tmp;
                                    break;
                              }
                        }
                  }
            }
      }
}
int main(){
      while(cin>>H&&H){
            memset(fld,-1,sizeof(fld));
            for(int i=H-1;i>=0;i--)REP(j,5)cin>>fld[j][i];
            bool update=true;
            ll ans=0;
            while(update){
                  update=false;
                  REP(i,H){
                        int s,e,d=0;bool change=false;
                        while(d<5){
                              if(fld[d][i]==-1){
                                    d++;
                                    continue;
                              }
                              s=d;
                              while(fld[s][i]==fld[d][i]&&d<=5)d++;
                              if(d-s>=3){
                                    e=d;
                                    change=true;
                                    break;
                              }
                        }
                        if(change){
                              update=true;
                              ans+=(e-s)*fld[s][i];
                              for(int j=s;j<e;j++)fld[j][i]=-1;
                        }
                  }
                  drop();
            }
            cout<<ans<<endl;
      }
      return 0;
}