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 <iostream>
using namespace std;

template<typename T, typename U> void dmin(T &x, U y) { if(x > y) x = y; }

const int MAX_N = 100;
const int INF = 1001001001;

int main() {
  int n, r, c;
  int rc[MAX_N][2];
  cin >> n;
  for (int i=0; i<n; i++) {
    cin >> r >> c;
    rc[i][0] = r; rc[i][1] = c;
  }

  int dp[MAX_N][MAX_N];
  for (int i=0; i<n; i++) {
    for (int j=0; j<n; j++) {
      dp[i][j] = INF;
    }
    dp[i][i] = 0;
  }

  for (int l=2; l<=n; l++) {
    for (int i=0; i+l-1<n; i++) {
      for (int j=1; j<l; j++) {
        dmin(dp[i][i+l-1], dp[i][i+j-1] + rc[i][0]*rc[i+j-1][1]*rc[i+l-1][1] + dp[i+j][i+l-1]);
      }
    }
  }

  cout << dp[0][n-1] << endl;
  return 0;
}

C++: #include<bits/stdc++.h>
#define INF (1e9)
#define N 105
using namespace std;
int n,r[N],c[N],dp[N][N];

void matrixChainOrder(){
  for(int l=2;l<=n;l++){
    for(int i=0;i<=n-l;i++){
      int j=i+l-1;
      dp[i][j]=INF;
      for(int k=i;k<j;k++)
	dp[i][j]=min(dp[i][j],dp[i][k]+dp[k+1][j]+r[i]*c[k]*c[j]);
    }
  }
}

int main(){
  cin>>n;
  for(int i=0;i<n;i++)
    cin>>r[i]>>c[i];
  matrixChainOrder();
  cout<<dp[0][n-1]<<endl;
  return 0;
}

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

using namespace std;

int main() {
	int n;
	cin >> n;
	int m[101];
	int M[101][101];
	for (int i = 1; i <= n; i++) {
		cin >> m[i-1] >> m[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] = 100000000000000000;
			for (int k = i; k < j; k++) {
				M[i][j] = min(M[i][j], M[i][k] + M[k + 1][j] + m[i - 1] * m[k] * m[j]);
			}
		}
	}
	cout << M[1][n] << endl;
	return 0;
}

C++: #include <iostream>
#include <vector>

int main()
{
  int n;
  std::cin >> n;
  std::vector<std::pair<int, int>> data;
  for (int i = 0; i < n; i++){
    int l , r;
    std::cin>> l >> r;
    data.push_back(std::make_pair(l, r));
  }

  std::vector<std::vector<int>> dp(n+1, std::vector<int>(n+1, 0));
  for (int w = 2; w <= n; w++){
    for (int l = 0; l < n; l++){
      int r = l+w;
      if(r>n)continue;
      dp[l][r] = 100000000;
      for (int mid = l+1; mid < r; mid++){
        dp[l][r] = std::min(dp[l][r], dp[l][mid] + dp[mid][r] + data[l].first*data[mid].first*data[r-1].second);
      }
    }
  }
  std::cout << dp[0][n] << std::endl;
}

C++: #include <iostream>
#include <stdio.h>
#include <vector>
#include <math.h>

#define inf 2147483647

using namespace std;

int main() {
    int n, tmp;
    vector<int> a;
    cin >> n;
    cin >> tmp;
    a.push_back(tmp);
    cin >> tmp;
    a.push_back(tmp);
    for (int i = 1; i < n; ++i) {
        cin >> tmp;
        cin >> tmp;
        a.push_back(tmp);
    }
    //--n;
    //vector<vector<int>> m(n + 1, vector<int>(n + 1, 0));
    //vector<vector<int>> s(n, vector<int>(n + 1, 0));
    int m[1001][1001];
    int s[1001][1001];
    for (int l = 2; l <= n; ++l) {
        for (int i = 1; i <= n - l + 1; ++i) {
            int j = i + l - 1;
            m[i][j] = inf;
            for (int k = i; k <= j - 1; ++k) {
                int q = m[i][k] + m[k + 1][j] + a[i - 1] * a[k] * a[j];
                if (q < m[i][j]) {
                    m[i][j] = q;
                    s[i][j] = k;
                }
            }
        }
    }
    cout << m[1][n] << endl;
    return 0;
}