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 <iostream>
#include <bits/stdc++.h>
#define endl '\n'
#define MAXN 1000000000
#define vi vector<int>
#define pii pair<int, int>
#define vii vector<pii>
using namespace std;


long long dp[101][101];
int s[101][101];
void order(int i,int j){
    int k;
    if(i==j) printf("A%d",i);
    else{
        k=s[i][j];
        printf("(");
        order(i,k);
        order(k+1,j);
        printf(")");
    }
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, n1; cin >> n; n1 = n;
    vi dim;
//    dim.push_back(0);
    int r, c;
    cin >> r >> c;
    dim.push_back(r);
    dim.push_back(c);
    n1--;
    while(n1--){
        cin >> r >> c;
        dim.push_back(c);
    }
    n++;
    for (int i = 0; i < n; ++i) {
        dp[i][i] = 0;
    }
    long long cost = 0;
//    n = dim.size() - 1;
    long long mincost = -MAXN;
    for (int len = 2; len < n; ++len) {
        for (int i = 1; i < n - len + 1; ++i) {
            int j = i + len - 1;
            dp[i][j] = MAXN;
            for (int k = i; k < j; ++k) {
                cost = dp[i][k] + dp[k + 1][j] + dim[i - 1] * dim[j] * dim[k];
                if(cost < dp[i][j]){
                    mincost = cost;
                    dp[i][j] = cost;
                    s[i][j] = k;
                }
            }
        }
    }
//    for (int l = 0; l <= n; ++l) {
//        for (int i = 0; i <= n; ++i) {
//            cout << dp[l][i] << " ";
//        }
//        cout << endl;
//    }
//    printf("Minimum Multiplication : %Ld\n",dp[1][n]);
//    printf("Order : ");
//    order(1,n);
//    printf("\n\n");
    cout << dp[1][n - 1] << endl;
//    cout << dp[2][n] << endl;
    return 0;
}

C++: #include<iostream>
#include<algorithm>
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;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>
using namespace std;
const int N = 102;

int main() {
    int n; cin >> n;
    int p[N+1], m[N+1][N+1];
    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;

void dp_solve(vector<vector<long long>> &dp, int l, int r, vector<pair<int, int>> &vp)
{
    if (dp[l][r] != -1)
    {
        return;
    }
    if (l == r)
    {
        dp[l][r] = 0;
        return;
    }
    for (int i = 0; i < r - l; i++)
    {
        dp_solve(dp, l, l + i, vp);
        dp_solve(dp, l + i + 1, r, vp);
    }
    dp[l][r] = 10000000000;
    for (int i = 0; i < r - l; i++)
    {
        dp[l][r] = min(dp[l][r], dp[l][l + i] + dp[l + i + 1][r] + vp[l].first * vp[l + i].second * vp[r].second);
    }
}

int main()
{
    int n;
    cin >> n;
    vector<vector<long long>> dp(n + 1, vector<long long>(n + 1, -1));
    vector<pair<int, int>> vp(n + 1);
    for (int i = 1; i <= n; i++)
    {
        int r, c;
        cin >> r >> c;
        vp[i] = make_pair(r, c);
    }
    dp_solve(dp, 1, n, vp);
    cout << dp[1][n] << endl;
}

C++: #include <iostream>
#include <vector>
#include <string>
#include <cmath>
#include <set>
#include <algorithm>
#include <array>
#include <complex>
#include <utility>
#include <map>
int needleX[4] = { -1,0,1,0 };
int needleY[4] = { 0,1,0,-1 };

int main(void) {
    int n;

    std::cin >> n;
    std::vector<int> p(100+1);
    for (int i = 1; i <= n; i++) {
        std::cin >> p[i-1] >> p[i];
    }
    int m[100 + 1][100 + 1];
    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] = std::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 = i+1; j <= n; j++) {
            std::cout << m[i][j] << " ";
        }
        std::cout << std::endl;
    }
    std::cout << m[1][n] << std::endl;
    return 0;
}