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>
#include <cmath>
#include <algorithm>
#include <stack>
#include <queue>
#include <vector>
 
using namespace std;
 
void func(int H){
    int table[H][5];
 
    for(int i = 0; i < H; i++){
        for(int k = 0; k < 5; k++)scanf("%d",&table[i][k]);
    }
 
    bool FLG;
    int count = 0;
 
    while(true){
 
        FLG = false;
 
        for(int i = 0; i < H; i++){
            for(int k = 0,p = 0; k <= 2; k++){
                if(table[i][k] == -1)continue;
                for(p = 1; k+p < 5 && table[i][k+p] == table[i][k]; p++);
                if(p >= 3){
                    for(int a = k; a < k+p; a++){
                        count += table[i][a];
                        table[i][a] = -1;
                        FLG = true;
                    }
                    break;
                }
            }
        }
 
        for(int col = 0; col < 5; col++){
            for(int row = H-2,i = 0; row >= 0; row--){
                if(table[row][col] != -1){
                    for(i = row+1; i < H && table[i][col] == -1; i++);
                    if(i > row+1){
                        table[i-1][col] = table[row][col];
                        table[row][col] = -1;
                    }
                }
            }
        }
 
        if(!FLG)break;
    }
 
    printf("%d\n",count);
}
 
 
int main(){
 
    int H;
 
    while(true){
        scanf("%d",&H);
        if(H == 0)break;
 
        func(H);
    }
 
    return 0;
}

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

int H, sum, zero;
bool update;
int array[11][5];

int main()
{
	do
	{
		cin >> H;
		if (H == 0)break;
		for (int i = H - 1; i >= 0; i--)
			for (int j = 0; j < 5; j++)
				cin >> array[i][j];
		sum = 0;
		do
		{
			update = false;
			for (int i = 0; i < H; i++)
			{
				if (array[i][2] == 0)
					break;
				if (array[i][2] == array[i][0] && array[i][2] == array[i][1])
				{
					if (array[i][2] != array[i][3])
					{
						sum += array[i][2] * 3;
						array[i][0] = 0;
						array[i][1] = 0;
						array[i][2] = 0;
						update = true;
					}
					else if (array[i][2] != array[i][4])
					{
						sum += array[i][2] * 4;
						array[i][0] = 0;
						array[i][1] = 0;
						array[i][2] = 0;
						array[i][3] = 0;
						update = true;
					}
					else
					{
						sum += array[i][2] * 5;
						array[i][0] = 0;
						array[i][1] = 0;
						array[i][2] = 0;
						array[i][3] = 0;
						array[i][4] = 0;
						update = true;
					}
				}
				else if (array[i][2] == array[i][1] && array[i][2] == array[i][3])
				{
					if (array[i][2] != array[i][4])
					{
						sum += array[i][2] * 3;
						array[i][1] = 0;
						array[i][2] = 0;
						array[i][3] = 0;
						update = true;
					}
					else
					{
						sum += array[i][2] * 4;
						array[i][1] = 0;
						array[i][2] = 0;
						array[i][3] = 0;
						array[i][4] = 0;
						update = true;
					}
				}
				else if (array[i][2] == array[i][3] && array[i][2] == array[i][4])
				{
					sum += array[i][2] * 3;
					array[i][2] = 0;
					array[i][3] = 0;
					array[i][4] = 0;
					update = true;
				}
			}
			if (!update)break;
			for (int j = 0; j < 5; j++)
			{
				for (zero = 0; zero < H - 1; zero++)
					if (array[zero][j] == 0)
						break;
				for (int search = zero + 1; search < H; search++)
					if (array[search][j]>0)
					{
						array[zero][j] = array[search][j];
						array[search][j] = 0;
						zero++;
					}
			}
		} while (true);
		cout << sum << endl;
	} while (true);
	return 0;
}