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>
#include <climits>
using namespace std;

int N ;
int a[101][101];
int m[101][2];

int main() {
    cin >> N;
    for (int i = 1; i <= N; ++i) {
        cin >> m[i][0] >> m[i][1];
    }

    for (int j = 1; j <= N; ++j) {
        a[j][j] = 0;
    }

    for (int k = 1; k < N; ++k) {
        for (int l = 1; l <= N- k ; ++l) {
            int j = l + k;
            int mn = INT_MAX;
            for (int p = l; p <= j-1 ; ++p) {
                mn = min(mn, a[l][p] + a[p+1][j] + m[l][0] * m[p][1] * m[j][1]);
            }
            a[l][j] = mn;
        }
    }
    cout << a[1][N] << endl;

    return 0;
}

C++: #include <stdio.h>
const int N=110;
const int INF=1<<30;
int min(int a,int b){
    return a>b?b:a;
}
int main(){
    int n,dp[N][N],a[N];
    scanf("%d%d%d",&n,&a[0],&a[1]);
    for(int i=1;i<n;i++)scanf("%d%d",&a[i],&a[i+1]);
    for(int k=1;k<n;k++){
        for(int i=0;i<n-k;i++){
            dp[i][i+k]=INF;
            for(int j=i;j<i+k;j++)dp[i][i+k]=min(dp[i][i+k],dp[i][j]+dp[j+1][i+k]+a[i]*a[j+1]*a[i+k+1]);
        }
    }
    printf("%d\n",dp[0][n-1]);
}

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

using namespace std;

int main  () {

    int i, j, k, l, n, p[101], m[101][101];

    cin >> n;

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

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

    for (l = 2; l <= n; l++) {
        for (i = 1; i <= n - l+ 1; i++) {
            j = i + l - 1;
            m[i][j] = (1 << 21);

            for (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 <stdio.h>
#include <algorithm>
using namespace std;
int n, r[100], c[100], dp[100][101];
int main() {
	scanf("%d", &n);
	for(int i = 0; i < n; i++) scanf("%d%d", &r[i], &c[i]), dp[i][i] = 0;
	for(int i = 1; i < n; i++) {
		for(int j = 0; i + j <= n; j++) {
			dp[j][i + j] = min(dp[j][i + j - 1], dp[j + 1][i + j]) + c[j] * c[i + j - 1];
		}
	}
	printf("%d\n", dp[0][n]);
	return 0;
}

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

// macro
#define rep(i,n) for(i=0;i<n;i++)
#define ll long long
#define all(v) v.begin(), v.end()

// code starts
#define INF 1020304050

int main()
{
  int n;cin>>n;
  vector<int> r(n);
  vector<int> c(n);
  int i,j,k;
  rep(i,n)cin>>r[i]>>c[i];
  vector<vector<int>> dp(n,vector<int>(n,INF));
  rep(i,n)dp[i][i]=0;
  rep(i,n-1)dp[i][i+1]=r[i]*c[i]*c[i+1];
  for(i=2;i<n;i++)
  {
    rep(j,n-i)
    {
      for(k=1;k<=i;k++)
      {
        dp[j][j+i]=min(dp[j][j+i],dp[j][j+k-1]+dp[j+k][j+i]+r[j]*r[j+k]*c[j+i]);
      }
    }
  }
  cout<<dp[0][n-1]<<endl;
}

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>
const int MAX_N = 100;
const int INF = 114514;
using namespace std;

int dp[MAX_N+1][MAX_N+1];
int p[MAX_N+1];

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

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

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

    return 0;
}