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++: //compiledef
#include <bits/stdc++.h>
#define rep(i, n) for(i=0;i<(n);i++)
#define per(i, n) for(i=(n);i>0;i--)
#define repx(i, n, x) for(i=(x);i<(n);i++)
#define xper(i, n, x) for(i=(n);i>(x);i--)
#define pback push_back

//c++def
using namespace std;
typedef long long int ll;
const ll MOD = 1e9+7;
const ll MOD2 = 998244353;
const ll INF =2e9;
ll matrixchainorder(int *a, int n){
	int i;
	static ll dp[150][150];
	repx(i, n, 1) dp[i][i] = 0;
	for(int l = 2;l<=n;l++){
		for(i = 1;i<=n-l+1;i++){
			int j = i+l-1;
			dp[i][j] = INF;
			for(int k = i; k<j;k++){
				ll x = dp[i][k] + dp[k+1][j] + (a[i-1]*a[k]*a[j]);
				dp[i][j] = min(dp[i][j], x);
			}
		}
	}
	return dp[1][n];	
}

int main(){
	int n;
	int i;
	cin >> n;
	int a[n+3];
	for(i=1;i<=n;i++){
		cin >> a[i-1] >> a[i];
	}
	cout <<	matrixchainorder(a, n) <<endl;
}

C++: if __name__ == '__main__':
    N = input()


    m = [[0] * (N+1) for i in range(N+1)]

    p = [0] * N

    for i in range (N):
        p[i],dummy  = map(int, raw_input().split())
        
    p.append(dummy)

    for l in range (2, N+1):
        for i in range(1, N - l + 2):
            j = i + l - 1
            m[i][j] = float("inf")
            for k in range(i, j):
                m[i][j] = min(m[i][j], m[i][k] + m[k+1][j] + p[i-1] * p[k] * p[j])

print "", m[1][N]

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<stdio.h>
#include<stdlib.h>
using namespace std;

static const int N = 100;

int main(){
    int n, p[N+1], m[N+1][N+1];
    cin >> n;
    for(int i =1 ; i<=n ; i++){
        cin >> 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-1 ; k++){
                m[i][j] = min(m[i][j], m[i][k] + m[k+1][j] + p[i-1]*p[k]*p[j]);
            }
        }
    }
    
    cout << m[1][n] << endl;
  
    return 0;
}

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

int main() {
	    int n;
	    cin>>n;

	    vector<pair<int,int> > B(n);
	    for(int i=0;i<n;i++)
	    {
                int a,b;
                cin>>a>>b;
                B[i].first=a;
	        B[i].second=b;
	    }
	    vector<vector<int> > dp(n,vector<int>(n,0));
	    for(int i=0;i<n-1;i++)
	        dp[i][i+1]=B[i].first*B[i].second*B[i+1].second;
	    for(int l=2;l<=n-1;l++)
	    {
	        for(int i=0;i<n-l;i++)
	        {
	            int j=i+l;
	            dp[i][j]=INT_MAX;
	            int q=dp[i][j];
	            for(int k=1;i+k<=j;k++)
	            {

	              q=min(q,dp[i][i+k-1]+dp[i+k][j]+B[i].first*B[i+k].first*B[j].second);
	                if( q < dp[i][j])
	                dp[i][j]=q;

	            }
	        }
	    }
	  /* for(int i=0;i<n;i++)
	   {
	       for(int j=0;j<n;j++)
	       cout<<dp[i][j]<<"           ";
	       cout<<endl;
	   }*/
	    cout<<dp[0][n-1]<<endl;

	return 0;
}

C++: #include <iostream>
#include<climits>
#include<vector>
using namespace std;
 
int MCM(int p[],int n) {
    vector<vector<int> > m(n+1,vector<int>(n+1));
    for (int i = 0; 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] = INT_MAX;
            for (int k = i; k <= j-1; k++) {
                int q = m[i][k] + m[k + 1][j] + p[i - 1] * p[k] * p[j];
                if (m[i][j] > q) {
                    m[i][j] = q;
                }
 
            }
        }
 
    }
    return m[1][n];
}
 
int main() {
    int n, p[200];
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> p[i] >> p[i + 1];
    }
    cout << MCM(p, n) << endl;
    return 0;
}

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

const int N=100;

int main(){
	int n,p[N+1],m[N+1][N+1];//m代表所需乘法运算的最小次数 
	cin>>n;
	for(int i=1;i<=n;i++)
		cin>>p[i-1]>>p[i];//存储矩阵的行数
	
	for(int i=1;i<=n;i++)
		m[i][i]=0; //初始化所需乘法运算所需最小次数
	
	for(int l=2;l<=n;l++){
		for(int i=1;i<=n-l+1;i++){
			int j=i+l-1;
			m[i][j]=(l<<21);//????
			for(int k=i;k<=j-1;k++){
				m[i][j]=min(m[i][j],m[i][k]+m[k+1][j]+p[i-1]*p[k]*p[j]);
			}
		}
	} 
	
	cout<<m[1][n]<<endl;
	
	return 0;
}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
#include <string>
#include <cctype>
#include <stack>
#include <queue>
#include <vector>
#include <cstdlib>
#include <list>
#define _USE_MATH_DEFINES
#include <math.h>

using namespace std;

int main() {

	int n, p[101], m[101][101];

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

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

	return 0;
}