Go: package main

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

func nextInt(sc *bufio.Scanner) int {
	sc.Scan()
	v, _ := strconv.Atoi(sc.Text())
	return v
}

func min(x, y int) int {
	if x > y {
		return y
	}
	return x
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)

	n := nextInt(sc)

	P := make([]int, n+1)
	for i := 1; i <= n; i++ {
		l := nextInt(sc)
		P[i-1] = l
		m := nextInt(sc)
		P[i] = m
	}

	matrix := make([][]int, n+1)
	for i := 0; i < n+1; i++ {
		matrix[i] = make([]int, n+1)
	}

	for l := 2; l <= n; l++ {
		for i := 1; i <= n - l + 1; i++ {
			j := i + l - 1
			matrix[i][j] = (1 << 21)
			for k := i; k <= j-1; k++ {
				matrix[i][j] = min(matrix[i][j], matrix[i][k] + matrix[k+1][j] + P[i-1] * P[k] * P[j])
			}
		}
	}
	fmt.Println(matrix[1][n])
}

C++: #include<algorithm>
#include<iostream>
#include<cstdlib>
#include<cstring>
#include<cstdio>
#include<vector>
#include<queue>
#include<stack>
#include<cmath>
#include<list>
#include<map>
#include<set>
using namespace std;

typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int,int> PII;
typedef long long LL;

#define d(x)  cout<<#x<<" = "<<(x)<<endl;
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define REACH(i,c) for(typeof((c).rbegin()) i=(c).rbegin(); i!=(c).rend(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c,n) sort(c,c+n)
#define VSORT(c) sort((c).begin(),(c).end())
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)
#define DFOR(i,b,a) for(int i=(b)-1;i>=(a);--i)
#define DREP(i,n) DFOR(i,n,0)
#define INF 2000000000

const double EPS = 1e-10;
const double PI  = acos(-1.0);
////////////////////////////////////////////////

C++: #include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i=0; i < (int)(n); i++)
using ull = unsigned long long;
using ll = long long;

const int INF = 1000010;

int MCMP(int N, int R[], int C[]) {
    int dp[N][N];
    rep(i, N) rep(j, N) {
        if (i==j) dp[i][j] = 0;
        else dp[i][j] = INF;
    }
    for (int len=0; len<=N; len++) {
        for (int s=0; s+len<N; s++) {
            int left = s, right = s+len;
            for (int mid=left; mid<right; mid++) {
                int lmr_num;
                lmr_num = dp[left][mid] + dp[mid+1][right] + R[left] * C[mid] * C[right];
                dp[left][right] = min(dp[left][right], lmr_num);
                // cout << " " << left << " " << right << " " << mid << " " << dp[left][right] << endl;
            }
        }
    }
    return dp[0][N-1];
}


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

    int R[N], C[N];
    rep(i, N) cin >> R[i] >> C[i];

    cout << MCMP(N, R, C) << endl;

    return 0;
}

C++: #include <iostream>
#include <string>
#include <map>
#include <set>
#include <algorithm>
using namespace std;
#define MAX 100000

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;
const int64_t INF = (1 << 21);
const int64_t MAXN = 110;
int64_t DP[MAXN][MAXN];

int main()
{
  int64_t N;
  cin >> N;
  vector<int64_t> M(N + 1);
  for (int i = 1; i <= N; i++)
    cin >> M[i - 1] >> M[i];
  for (int i = 1; i <= N; i++)
    DP[i][i] = 0;
  for (int l = 2; l <= N; l++)
  {
    for (int i = 1; i <= N - l + 1; i++)
    {
      int j = i + l - 1;
      DP[i][j] = INF;
      for (int k = i; k <= j - 1; k++)
      {
        DP[i][j] = min(DP[i][j], DP[i][k] + DP[k + 1][j] + M.at(i - 1) * M.at(k) * M.at(j));
      }
    }
  }
  cout << DP[1][N] << endl;
}

C++: #include<iostream>
#include<algorithm>
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];
	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;
}