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 <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    int f,i,g,j,k,l,n,a,b,c,d,e;
    int score,ed;

    while(1){
        vector< vector<int> > bd(5);
        score=0;
        cin >> n;
        if(!n){break;}
        for(i=0;i<n;i++){
            cin>>a>>b>>c>>d>>e;
            bd[0].push_back(a);
            bd[1].push_back(b);
            bd[2].push_back(c);
            bd[3].push_back(d);
            bd[4].push_back(e);
        }
        
        ed=1;
        while(ed){
            ed=0;
            for(i=0;i<5;i++){
                reverse(bd[i].begin(),bd[i].end());
            }
            
            for(g=0;g<n;g++){
                for(i=0;i<3;i++){ //start
                    if(!bd[i][g]){continue;}
                    for(j=4;j>=2;j--){ //width
                        if((i+j)>4){continue;}
                        if(!bd[i+j][g]){continue;}
                        f=1;
                        for(k=i;k<=i+j;k++){
                            if(bd[k][g]!=bd[i][g]){f=0;break;}
                        }
                        if(f){
                            ed=1;
                            for(k=i;k<=j+i;k++){
                                if(bd[k][g]!=-1){
                                    score+=bd[k][g];
                                    bd[k][g]=-1;
                                }
                            }
                        }
                    }
                }
            }

            for(i=0;i<5;i++){
                while(1){
                    auto q=find(bd[i].begin(),bd[i].end(),-1);
                    if(q!=bd[i].end()){bd[i].erase(q);bd[i].push_back(0);}
                    else{break;}
                }
                reverse(bd[i].begin(),bd[i].end());
            }
        }
        cout<<score<<endl;
        bd.clear();
        bd.shrink_to_fit();
    }
    return 0;
}

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

int main() {
    while(true){
        int h;cin >> h;
        if(h == 0) break;
        int c[15][5];
        for(int i=h-1;i>=0;i--){
            for(int j=0;j<5;j++){
                cin >> c[i][j];
            }
        }

        int ans = 0;
        while(true){
            // erase
            // cout << "hoge" << endl;
            bool flag = false;
            for(int i=0;i<h;i++){
                int bb = c[i][0];
                int l = 0, r = 1;
                // int cc = c[i][0];
                for(int j=1;j<5;j++){
                    if(c[i][j] == bb && c[i][j] != 0){
                        // cc = c[i][j];
                        r++;
                    }else{
                        if(j >= 3){
                            break;
                        }
                        l = j;
                        r = j+1;
                        // cc = c[i][j];
                        bb = c[i][j];
                    }
                }
                // cout << count << "count" << endl;
                if(r-l >= 3){
                    flag = true;
                    for(int j=l;j<r;j++){
                        ans += c[i][j];
                        c[i][j] = 0;
                    }
                }
            }

            // cout << "before" << endl;
            // for(int i=0;i<h;i++){
            //     for(int j=0;j<5;j++){
            //         cout << c[i][j];
            //     }
            //     cout << endl;
            // }
            // fall
            for(int j=0;j<5;j++){
                int i=0;
                for(int k=0;k<h;k++){
                    if(c[k][j] != 0){
                        c[i][j] = c[k][j];
                        i++;
                    }
                }
                for(int k=i;k<h;k++){
                    c[k][j] = 0;
                }
            }
            // cout << "after" << endl;
            // for(int i=0;i<h;i++){
            //     for(int j=0;j<5;j++){
            //         cout << c[i][j];
            //     }
            //     cout << endl;
            // }
            // cout << endl;
            if(!flag) break;
        }
        cout << ans << endl;
    }
    return 0;
}