Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

var scanner = bufio.NewScanner(os.Stdin)

// 文字列を1行取得
func StrStdin() (stringReturned string) {
//	scanner := bufio.NewScanner(os.Stdin)

	scanner.Scan()
	stringInput := scanner.Text()

	stringReturned = strings.TrimSpace(stringInput)
	return
}

// 整数値1つ取得
func IntStdin() (int, error) {
	stringInput := StrStdin()
	return strconv.Atoi(strings.TrimSpace(stringInput))
}

// 空白や空文字だけの値を除去したSplit()
func SplitWithoutEmpty(stringTargeted string, delim string) (stringReturned []string) {
	stringSplited := strings.Split(stringTargeted, delim)

	for _, str := range stringSplited {
		if str != "" {
			stringReturned = append(stringReturned, str)
		}
	}

	return
}

// デリミタで分割して文字列スライスを取得
func SplitStrStdin(delim string) (stringReturned []string) {
	// 文字列で1行取得
	stringInput := StrStdin()

	// 空白で分割
	// stringSplited := strings.Split(stringInput, delim)
	stringReturned = SplitWithoutEmpty(stringInput, delim)

	return
}

// デリミタで分割して整数値スライスを取得
func SplitIntStdin(delim string) (intSlices []int, err error) {
	// 文字列スライスを取得
	stringSplited := SplitStrStdin(" ")

	// 整数スライスに保存
	for i := range stringSplited {
		var iparam int
		iparam, err = strconv.Atoi(stringSplited[i])
		if err != nil {
			return
		}
		intSlices = append(intSlices, iparam)
	}
	return
}

func main() {
	nk, _ := SplitIntStdin(" ")
	n, k := nk[0], nk[1]
	kind := make([]int, n)
	for i := 0; i < k; i++ {
		var tmp []int
		var err error
		if tmp, err = SplitIntStdin(" "); err != nil {
			panic(err)
		}
		kind[tmp[0]-1] = tmp[1]
	}
	dp := make([][3][3]int, n)
	if kind[0] > 0 {
		dp[0][0][kind[0]-1] = 1
	} else {
		for i := 0; i < 3; i++ {
			dp[0][0][i] = 1
		}
	}
	if kind[1] > 0 {
		for i := 0; i < 3; i++ {
			dp[1][i][kind[1]-1] = dp[0][0][i]
		}
	} else {
		for i := 0; i < 3; i++ {
			for j := 0; j < 3; j++ {
				dp[1][i][j] = dp[0][0][i]
			}
		}
	}
	for i := 1; i < n-1; i++ {
		if kind[i+1] > 0 {
			for j := 0; j < 3; j++ {
				if j == kind[i+1]-1 {
					for k := 0; k < 3; k++ {
						if j != k {
							dp[i+1][j][kind[i+1]-1] += dp[i][k][j]
							dp[i+1][j][kind[i+1]-1] %= 10000
						}
					}
				} else {
					for k := 0; k < 3; k++ {
						dp[i+1][j][kind[i+1]-1] += dp[i][k][j]
						dp[i+1][j][kind[i+1]-1] %= 10000
					}
				}
			}
		} else {
			for j := 0; j < 3; j++ {
				for k := 0; k < 3; k++ {
					for l := 0; l < 3; l++ {
						if j != k || k != l {
							dp[i+1][k][j] += dp[i][l][k]
							dp[i+1][k][j] %= 10000
						}
					}
				}
			}
		}
	}
	result := 0
	for i := 0; i < 3; i++ {
		for j := 0; j < 3; j++ {
			result += dp[n-1][i][j]
		}
	}
	// fmt.Println(dp)
	// fmt.Println(kind)
	fmt.Println(result % 10000)
}

C++: #include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <climits>
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <algorithm>
#include <utility>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <functional>

using namespace std;

#define fst first
#define scd second
#define PB push_back
#define MP make_pair
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define omajinai ios::sync_with_stdio(false);cin.tie(0)
#define rep(i,x) for(int i=0;i<(int)(x);++i)
#define rep1(i,x) for(int i=1;i<=(int)(x);++i)

using ll=long long;
using ld=long double;
using vi=vector<int>;
using vvi=vector<vi>;
using pii=pair<int, int>;
using vpii=vector<pii>;

template<class T,class U>ostream&operator<<(ostream&os,const pair<T,U>p){os<<"("<<p.fst<<", "<<p.scd<<")";return os;}
template<class T>ostream&operator<<(ostream&os,const vector<T>v){rep(i,v.size()){if(i)os<<", ";os<<v[i];}return os;}
template<typename T>T&max(T&a,T&b){if(a>=b)return a;return b;}
template<typename T>T&min(T&a,T&b){if(a < b)return a;return b;}
template<typename T>bool chmax(T&a,T b){if(a < b){a=b;return true;}return false;}
template<typename T>bool chmin(T&a,T b){if(a > b){a=b;return true;}return false;}

constexpr int inf = 1e9;
constexpr ll linf = 3e18;
constexpr double eps = 1e-9;

int N, K;
int dp[105][3][3]; // dp[?????\??????][?????\???????????\???][?????\???????????\???]
int menu[105];

int main()
{
    cin >> N >> K;

    memset(menu, -1, sizeof menu);

    rep(i, K) {
        int a, b; cin >> a >> b;
        menu[a - 1] = b - 1;
    }

    dp[0][0][1] = 1;

    if (menu[0] != -1) {
        dp[1][menu[0]][!menu[0]] = 1;
    } else {
        rep(i, 3) {
            dp[1][i][!i] = 1;
        }
    }

    if (menu[1] != -1) {
        rep(i, 3) {
            rep(j, 3) {
                dp[2][menu[1]][i] += dp[1][i][j];
                dp[2][menu[1]][i] %= 10000;
            }
        }
    } else {
        rep(i, 3) rep(j, 3) {
            dp[2][i][j] += dp[1][j][!j];
            dp[2][i][j] %= 10000;
        }
    }

    for (int i = 2; i < N; ++i) {
        if (menu[i] != -1) {
            rep(j, 3) {
                rep(k, 3) {
                    if (menu[i] == j && j == k) continue;
                    dp[i + 1][menu[i]][j] += dp[i][j][k];
                    dp[i + 1][menu[i]][j] %= 10000;
                }
            }
        } else {
            rep(j, 3) {
                rep(k, 3) {
                    rep(l, 3) {
                        if (j == k && k == l) continue;
                        dp[i + 1][j][k] += dp[i][k][l];
                        dp[i + 1][j][k] %= 10000;
                    }
                }
            }
        }
    }

    int ans = 0;

    rep(i, 3) rep(j, 3) {
        ans += dp[N][i][j];
        ans %= 10000;
    }

    cout << ans << endl;
}

C++: #include<cstdio>
#include<functional>
#include<algorithm>
#include<iostream>
#include<cstring>
#include<string>
#include<cstdlib>
#include<cctype>
#include<queue>
#define MM
#define rep(i,a) for(int i=0;i<a;i++)
#define rep2(i,a) for(int i=1;i<=a;i++)
#define rep3(i,a) for(int i=1;i<a;i++)
#define rep4(i,a) for(int i=0;i<=a;i++)
using namespace std;
int dp[110][5][5];
long long int sum;
int main(void)
{
	int x,y;
	int day,al,sosu[110]={MM};
	cin>>day>>al;
	rep(i,al) {cin>>x>>y;sosu[x]=y;}
	dp[MM][MM][MM]=1;
	rep2(i,day)rep(j,4)rep(k,4)rep3(kk,4) {
		if((j!=k||k!=kk)&&(sosu[i]==MM||sosu[i]==kk)) {
            dp[i][k][kk]+=dp[i-1][j][k];
            dp[i][k][kk]%=10000;
		}
	}
	sum=0;
	rep2(i,3)rep4(j,3) sum+=dp[day][i][j];
	cout<<sum%10000<<endl;
	return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<algorithm>

using namespace std;

int pasta(int i,int af1,int af2);
int pastac(int i,int p,int pn);

int day[102];
int memo[102][4][4];
int n,k;

main(){
  int temp;
  scanf("%d %d",&n,&k);
  for(int i=0;i<k;i++){
    scanf("%d",&temp);
    scanf("%d",&day[temp]);
  }
  printf("%d\n",pastac(0,0,0));
  //  printf("%d\n",pasta(0,0,0));
}


int pastac(int i,int p,int pn){
  int res=0;
  if(i>=n) return 1;
  if(memo[i][p][pn]) return memo[i][p][pn];

  if(day[i]){
    if(p==day[i]){
      if(pn==2) return 0;
      return memo[i][p][pn]=(pastac(i+1,p,pn+1))%10000;
    }
    return memo[i][p][pn]=(pastac(i+1,day[i],1))%10000;
  }

  for(int j=1;j<=3;j++){
    if(j==p){
      if(pn!=2)res+=(pastac(i+1,p,pn+1))%10000;
    }
    else res+=(pastac(i+1,j,1))%10000;
  }

  return memo[i][p][pn]=res%10000;

}

//---------------------------------------------
int pasta(int i,int af1,int af2){
  int f[4]={0};
  int res=0;

  if(i==n) return 1;
  if(memo[i][af1][af2]) return memo[i][af1][af2];

  if(af1==af2) f[af1]=1;
  if(af1==day[i+1]) f[af1]=1;
  if(day[i+1]==day[i+2]) f[day[i+1]]=1;

  for(int j=1;j<=3;j++){
    if(f[j])continue;
    if(day[i]){
      if(day[i]==j) res+=(pasta(i+1,day[i],af1))%10000;
    }
    else res+=(pasta(i+1,j,af1))%10000;
  }
  return  memo[i][af1][af2]=(res)%10000;
}