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 <cstdio>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;

typedef pair<int,int> cor_t;

int board[5][10];

int main(){
    int H;
    while(scanf("%d",&H)&&H!=0){
        for(int j=H-1;j>=0;j--)
            for(int i=0;i<5;i++) {
                int temp;
                scanf("%d",&temp);
                board[i][j]=temp;
            }

        int score=0;
        bool has_puzzles=false;
        do{
            has_puzzles=false;
            for(int row=0;row<H;row++){
                for(int i=0;i<=2;i++){
                    if (board[i][row]==0) continue;

                    int len=1;
                    for(int j=i+1;j<5&&board[j][row]==board[i][row];j++) len++;

                    if (len>=3){
                        for(int k=i;k<i+len;k++) {
                            score+=board[k][row] ;
                            board[k][row]=0;
                        }
                        has_puzzles=true;
                        break;
                    }
                }
            }

            for(int i=0;i<5;i++)
                for(int row=H-1;row>0;row--)
                    for(int j=0;j<row;j++)
                        if (board[i][j]==0) swap(board[i][j],board[i][j+1]);


            // puts("demo");
            // for(int i=H-1;i>=0;i--){
            //     for(int j=0;j<5;j++){
            //         printf("%d ",board[j][i]);
            //     }
            //     putchar('\n');
            // }
                    
        }while(has_puzzles);

        printf("%d\n",score);

    }

    return 0;
}

C++: #include <iostream>
using namespace std;
int main(void){
    while(true){
        int h;
        cin >> h;
        if(h == 0){
            break;
        }
        int cells[h][5];
        for(int i = 0; i < h; i++){
            cin >> cells[i][0] >> cells[i][1] >> cells[i][2] >> cells[i][3] >> cells[i][4];
        }
        int score = 0;
        bool isErased = false;
        do{
            isErased = false;
            for(int i = 0; i < h; i++){
                int currentRecording = cells[i][0];
                int currentCount = 1;
                for(int j = 1; j < 5; j++){
                    if(cells[i][j] == currentRecording && currentRecording != -1){
                        currentCount++;
                    }else {
                        if(currentCount >= 3){
                            isErased = true;
                            score += currentRecording * currentCount;
                            for(int k = j - 1; k >= 0; k--){
                                if(cells[i][k] == currentRecording){
                                    cells[i][k] = -1;
                                }else{
                                    break;
                                }
                            }
                        }
                        currentCount = 1;
                        currentRecording = cells[i][j];
                    }
                }
                if(currentCount >= 3){
                    isErased = true;
                    score += currentRecording * currentCount;
                    for(int k = 4; k >= 0; k--){
                        if(cells[i][k] == currentRecording){
                            cells[i][k] = -1;
                        }else{
                            break;
                         }
                    }
                }
            }
            if(isErased){
            for(int i = h; i > 0; i--){
                for(int j = 0; j < 5; j++){
                    if(cells[i][j] == -1){
                        for(int k = i; k >= 0; k--){
                            if(cells[k][j] != -1){
                                cells[i][j] = cells[k][j];
                                cells[k][j] = -1;
                                break;
                            }
                        }
                    }
                }
            }
            }
        }while(isErased);
        cout << score << endl;
    }
    return 0;
}