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>
using namespace std;

int h, d[10][5];

int check() {
  int counter = 0;
  for (int i = 0; i < h; i++) {
    for (int j = 0; j < 3; j++) {
      if (d[i][j] == -10) continue;
      if (d[i][j] == d[i][j + 1] && d[i][j] == d[i][j + 2]) {
        int num = d[i][j];
        for (int k = j; k < 5; k++) {
          if (d[i][k] == num) d[i][k] = -1, counter += num;
          else break;
        }
        break;
      }
    }
  }
  return counter;
}

void fall() {
  for (int j = 0; j < 5; j++) {
    int counter = 0;
    for (int i = h - 1; i >= 0; i--) {
      if (d[i][j] == -10) break;
      if (d[i][j] == -1) counter++;
      else d[i + counter][j] = d[i][j];
    }
    for (int i = 0; i < counter; i++) d[i][j] = -10;
  }
  for (int i = 0; i < h; i++) for (int j = 0; j < 5; j++) if (d[i][j] == -1) d[i][j] = -10;
}

int main() {
  while (1) {
    scanf("%d", &h);
    if (h == 0) break;
    for (int i = 0; i < h; i++) for (int j = 0; j < 5; j++) scanf("%d", &d[i][j]);
    int sum = 0;
    while (1) {
      int counter = check();
      if (counter == 0) break;
      sum += counter;
      fall();
    }
    printf("%d\n", sum);
  }
}

C++: #include<bits/stdc++.h>
using namespace std;
#define int long long 

int table[15][10];
bool sign[15][10];

signed main(void){
  int H;
  while(cin >> H){
    
    if( H == 0 ){ return 0;}
    
    for(int i = 0; i < H; i++){
      for(int j = 0; j < 5; j++){ 
        cin >> table[H-i-1][j];
      }
    }// H方向に消える↪︎0方向に消える　としたい
    
    int ans = 0;
    
    while(true){ //消えるものがある限り続ける
      
      bool flag = true;
      
      for(int i = 0; i < H; i++){ 
        //５つ消える時について
        for(int j = 0; j < 5; j++){ sign[i][j] = false;} //初期化
        
        if( table[i][0] == table[i][1] && table[i][1] == table[i][2] && table[i][2] == table[i][3] && table[i][3] == table[i][4]){
          if( table[i][0] != -1 ){
  
          sign[i][0] = true;
          sign[i][1] = true;
          sign[i][2] = true;
          sign[i][3] = true;
          sign[i][4] = true;
          flag = false; ans += table[i][0]*5;
          }
        }//５つ全部消える場合
        
        else if( table[i][0] == table[i][1] && table[i][1] == table[i][2] && table[i][2] == table[i][3] ){
          if(table[i][0] != -1){
          sign[i][0] = true; sign[i][1] = true; sign[i][2] = true; sign[i][3] = true;
          flag = false; ans += table[i][0]*4;
          }
        }
        else if( table[i][1] == table[i][2] && table[i][2] == table[i][3] && table[i][3] == table[i][4] ){
          if(table[i][1] != -1){
          sign[i][1] = true; sign[i][2] = true; sign[i][3] = true; sign[i][4] = true;
          flag = false; ans += table[i][1]*4;
          }
        }
        //４つ消える場合
        else if( table[i][0] == table[i][1] && table[i][1] == table[i][2] ){
          if(table[i][0] != -1 ){ 
          sign[i][0] = true; sign[i][1] = true; sign[i][2] = true;
          flag = false; ans += table[i][0]*3;
          }
        }
        else if( table[i][1] == table[i][2] && table[i][2] == table[i][3] ){
          if(table[i][1] != -1){
          sign[i][1] = true; sign[i][2] = true; sign[i][3] = true;
          flag = false; ans += table[i][1]*3;
          }
        }
        else if( table[i][2] == table[i][3] && table[i][3] == table[i][4] ){
          if(table[i][2] != -1){
          sign[i][2] = true; sign[i][3] = true; sign[i][4] = true;
          flag = false; ans += table[i][2]*3;
          }
        }
        //3つ消える場合
        
      }//for-i 
      
      //以上コンボが決まるものについて印signをつけた
      vector<int> vec;
      for(int j = 0; j < 5; j++){ 
        vec.clear();
        for(int i = 0; i < H; i++){ 
          if( !sign[i][j] && table[i][j] != -1 ){ // 消さなものだけ残していく
            vec.push_back(table[i][j]);
          }
        }//for-H
        int m = vec.size();
        for(int i = 0; i < H; i++){ 
          if( i < m ){ 
           table[i][j] = vec[i];
          }
          else{
            table[i][j] = -1; //空いたところには-1を埋める
          }
        }//for-i
      }//for-j
      
      if(flag){ //もう消すところがなかった
        break;
      }
      
    }//while-true
    
    cout << ans << endl;
    
  }//while-cin
  
  return 0;
}