Go: package main

/*
連鎖行列積
*/

import (
	"bufio"
	"bytes"
	"fmt"
	"log"
	"math"
	"os"
	"strconv"
	"strings"
)

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

type mem *[][]int

func main() {
	scanner := makeScanner(1024)
	n := eGetInt(scanner)
	p := make([]int, n+1)
	for i := 0; i < n; i++ {
		rowcol := eGetInts(scanner)
		p[i] = rowcol[0]
		p[i+1] = rowcol[1]
	}
	m := make([][]int, n)
	for i := 0; i < n; i++ {
		m[i] = make([]int, n)
	}
	// 初期値の格納
	for i := 0; i < n; i++ {
		for j := i; j < n; j++ {
			if i == j {
				m[i][j] = 0 //  同じ行列へのコストは当然0
			} else {
				m[i][j] = math.MaxInt64
			}
		}
	}

	// num : 行列の数. num == 1の場合は初期値0を格納ずみ
	for num := 2; num <= n; num++ {
		// s : スタート行列番号
		for s := 0; s+num <= n; s++ {
			// t : 終了行列番号
			t := s + num - 1
			// k : 仕切
			for k := s; k < t; k++ {
				m[s][t] = min(m[s][t], m[s][k]+m[k+1][t]+p[s]*p[k+1]*p[t+1])
			}
		}
	}
	fmt.Println(m[0][n-1])
}

////////////////////////////////////////////////////////////////////////////////
// ライブラリ
////////////////////////////////////////////////////////////////////////////////
func makeScanner(maxByte int) *bufio.Scanner {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Buffer(make([]uint8, 0, 8192), maxByte)
	return scanner
}
func makeWordScanner() *bufio.Scanner {
	scanner := makeScanner(8192)
	scanner.Split(bufio.ScanWords)
	return scanner
}
func eGetLine(r *bufio.Scanner) string {
	if r.Scan() {
		return r.Text()
	}
	err := r.Err()
	if err != nil {
		log.Fatal(err)
	}
	// EOF
	return ""
}
func eGetInt(r *bufio.Scanner) int {
	line := eGetLine(r)
	return eAtoi(line)
}
func eGetFields(r *bufio.Scanner) []string {
	line := eGetLine(r)
	return strings.Fields(line)
}
func eGetInts(r *bufio.Scanner) []int {
	fields := eGetFields(r)
	ints := make([]int, len(fields))
	for i := 0; i < len(ints); i++ {
		ints[i] = eAtoi(fields[i])
	}
	return ints
}
func eGetChars(r *bufio.Scanner) []string {
	line := eGetLine(r)
	return strings.Split(line, "")
}
func eAtoi(s string) int {
	n, err := strconv.Atoi(s)
	if err != nil {
		log.Fatal(err)
	}
	return n
}

type ints []int

func (s ints) String() string {
	var buf bytes.Buffer
	buf.WriteString("[")
	sep := ""
	for _, v := range s {
		buf.WriteString(fmt.Sprintf("%s%d", sep, v))
		sep = ", "
	}
	buf.WriteString("]")
	return buf.String()
}

func reverse(a ints) ints {
	r := make(ints, len(a))
	for i := 0; i < len(a); i++ {
		r[i] = a[len(a)-1-i]
	}
	return r
}
func max(a ints) (int, bool) {
	if len(a) == 0 {
		return 0, false
	}
	m := a[0]
	for _, e := range a {
		if e > m {
			m = e
		}
	}
	return m, true
}

// func min(a []int) int {
// 	m := a[0]
// 	for _, v := range a {
// 		if v < m {
// 			m = v
// 		}
// 	}
// 	return m
// }

func sum(a ints) int {
	if len(a) == 0 {
		return 0
	}
	sum := 0
	for _, e := range a {
		sum += e
	}
	return sum
}
func find(n int, a ints) int {
	for i, v := range a {
		if n == v {
			return i
		}
	}
	return -1
}

C++: #include <stdio.h>
#define SIZE 110
#define INF 1000000009

int dp[SIZE][SIZE];
int in[SIZE];

int min(int a, int b){
    return (a<b ? a : b);
}

int main(){
    int n,i,j,k;
    scanf("%d",&n);
    for(i=1; i<=n; i++){
        scanf("%d %d",&in[i-1],&in[i]);
    }

    for(i=1; i<=n; i++) dp[i][i] = 0;

    for(k=2; k<=n; k++){
        for(i=1; i<=n-k+1; i++){
            int v;
            v = i+k-1;
            dp[i][v] = INF;
            for(j=i; j<=v-1; j++){
                dp[i][v] = min(dp[i][v],dp[i][j]+dp[j+1][v]+in[i-1]*in[j]*in[v]);
            }
        }
    }

    printf("%d\n",dp[1][n]);

    return 0;
}

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

using ll = long long;
#define REP(i,n) for(int i=0; i < (n); ++i)
#define REPR(i,n) for(int i=(n); i >= 0; --i)
#define FOR(i, m, n) for(int i = (m); i < (n); ++i)
// #define INF 1e9
const ll INF = 1LL << 60;

int n;
vector<int> r, c;
ll dp[105][105];

ll solve(){
  REP(i, n+1){
    dp[i][i+1] = 0;
  }
  FOR(w, 2, n+1){
    REP(left, n){
      int right = left + w;
      if(right > n) break;
      FOR(i, left+1, right){
        dp[left][right] = min(dp[left][right], dp[left][i]+dp[i][right] + r[left] * c[right-1]*r[i]);
      }
    }
  }
  return dp[0][n];
}

int main(){
  cin >> n;
  r.resize(n), c.resize(n);
  REP(i, n){
    cin >> r[i] >> c[i];
  }
  REP(i, n+3){
    REP(j, n+3){
      dp[i][j] = INF;
    }
  }
  cout << solve() << endl;
  return 0;
}

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

using namespace std;

int c[1005][1005];

int lcs( string X, string Y){

    int m, n, i, j;

    m = X.size();
    n = Y.size();

    X = ' ' + X;
    Y = ' ' + Y;

    int Lmax = 0;

    for( i = 1; i <= m ; i++){

        c[i][0] = 0;

    }

    for( i = 1; i <= n ; i++ ){

        c[0][i] = 0;

    }

    for( i = 1; i <= m; i++ ){

        for( j = 1; j <= n ; j++ ){

            if( X[i] == Y[j] ){

                c[i][j] = c[i-1][j-1] + 1;

            } else if( c[i-1][j] >= c[i][j-1] ){

                c[i][j] = c[i-1][j];

            } else {

                c[i][j] = c[i][j-1];

            }

            Lmax = max( Lmax, c[i][j] );

        }

    }

    return Lmax;

}

int main(){

    int n;
    string X, Y;

    cin >> n;

    for( int i = 0 ; i < n ; i++ ){

        cin >> X >> Y;

        cout << lcs( X, Y) << endl;

    }

    return 0;

}

C++: #include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define mod 1000000007
#define MAX 105

ll p[MAX], m[MAX][MAX];

int main(){
    int n; cin >> n;
    for(int i = 0; i <= n; i++){
        int a,b; cin >> a >> b;
        if(i == 0){
            p[i] = a; i++; p[i] = b;
        }else{
            p[i] = b;
        }
    }

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            if(i == j) m[i][j] = 0;
            else m[i][j] = INT_MAX;
        }
    }

    for(int len = 2; len <= n; len++){ //計算する行列の個数
        for(int i = 1; i <= n-len+1; i++){ //左端
            int j = i + len -1; //右端
            for(int k = i; k < j; k++){
                m[i][j] = min(m[i][j], m[i][k] + m[k+1][j] + p[i-1]*p[k]*p[j]);
                
            }
        }
    }

    // for(int i = 1; i <= n; i++){
    //     for(int j = 1; j <= n; j++){
    //         cout << m[i][j] << " ";
    //     }
    //     cout << endl;
    // }

    cout << m[1][n] << endl;

    return 0;
}

C++: #include <iostream>
#include <stdio.h>
#define N 101
#define MAX 1 << 21
using namespace std;

int main(int argc, char *argv[])
{
    int n, q;
    scanf("%d", &n);
    int p[N], m[N][N];
    for (int i = 1; i <= n; i++)
    {
        scanf("%d %d", &p[i - 1], &p[i]);
    }

    for (int i = 1; i <= n; i++)
    {
        m[i][i] = 0;
    }

    for (int l = 2; l <= n; l++)
    {
        for (int i = 1; i <= n - l + 1; i++)
        {
            int j = i + l - 1;
            m[i][j] = (1 << 21);
            for (int k = i; k < j; k++)
            {
                q = m[i][k] + m[k + 1][j] + p[i - 1] * p[k] * p[j];
                if (q < m[i][j])
                {
                    m[i][j] = q;
                }
            }
        }
    }

    printf("%d\n", m[1][n]);
    return 0;
}