Go: package main

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

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 500001), 500000)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func main() {
	fp := os.Stdin
	if len(os.Args) > 1 {
		fp, _ = os.Open(os.Args[1])
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(os.Stdout)

	n := getNextInt(scanner)
	mm := make([]int, n+1)
	dp := make([][]int, n+1)
	for i := 0; i <= n; i++ {
		dp[i] = make([]int, n+1)
	}
	for i := 0; i < n; i++ {
		mm[i] = getNextInt(scanner)
		mm[i+1] = getNextInt(scanner)
	}

	for l := 2; l <= n; l++ {
		for i := 1; i <= n-l+1; i++ {
			j := i + l - 1
			for k := i; k <= j-1; k++ {
				d := dp[i][k] + dp[k+1][j] + mm[i-1]*mm[k]*mm[j]
				if dp[i][j] == 0 || dp[i][j] > d {
					dp[i][j] = d
				}
			}
		}
	}

	fmt.Fprintln(writer, dp[1][n])

	writer.Flush()
}

C++: #include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <cstdio>
#include <cmath>
#include <tuple>
#include <iomanip>
#include <numeric>
#include <unordered_map>
#include <sstream>   
#include<limits.h>
#include<list>
#include <array>
using namespace std;
#define i64  long long
#define int  long long
 
#define I32_MAX 2147483647
#define I64_MAX 9223372036854775807
#define INF I64_MAX
#define MOD 1000000007
#define MEM_SIZE = 1e5+5;

template<typename T> void DEBUG(T e){std::cout << e << std::endl;}
template<class T> void DEBUG(string str, T e){std::cout <<str << ">>" << e << std::endl;}
template<typename T> void DEBUG(const std::vector<T>& v){for(const auto& e : v){ std::cout << e << " "; } std::cout << std::endl;}
template<typename T> void DEBUG(const std::vector<std::vector<T> >& vv){ for(const auto& v : vv){ DEBUG(v); } }
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}




//-----CODE------//


void solve(void)
{
  int N;
  cin>>N;
  vector<int> INPUT(N+1);
  for (int i = 0; i < N; i++)
  {
    cin>>INPUT[i]>>INPUT[i+1];
  }
  vector<vector<int> > DP(N+1,vector<int>(N+1,INF));
  for (int i = 0; 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;
      for (int k = i; k <= j-1; k++)
      {
        DP[i][j] = min(DP[i][j],DP[i][k] + DP[k+1][j] +INPUT[j]*INPUT[k]*INPUT[i-1]);
      }
    }
  }
  cout<<DP[1][N]<<endl;
  
  
  
  return; 
}


int32_t main(int32_t argc, const char *argv[])
{
  std::ios::sync_with_stdio(false);
  std::cin.tie(0);

  std::cout << std::fixed;
  std::cout << std::setprecision(9);
  solve();

 
  return 0;
}

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

int main() {
    int n;
    scanf("%d", &n);
    vector<int> p(n+1);
    rep(i, n) {
        int r, c;
        scanf("%d %d", &r, &c);
        if (i == 0) p[i] = r;
        p[i+1] = c;
    }

    int m[n+1][n+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;
            int MIN;
            for (int k = i; k < j; k++) {
                if (k == i) MIN = m[i][k] + m[k+1][j] + p[i-1] * p[k] * p[j];
                else MIN = min(MIN, m[i][k] + m[k+1][j] + p[i-1] * p[k] * p[j]);
            }
            m[i][j] = MIN;
        }
    }
    printf("%d\n", m[1][n]);
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define EPS (1e-7)
#define INF (1e9)
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
const double PI = acos(-1);
const ll MOD = 1000000007;
template<class T>
inline bool chmax(T &a, T b) {
    if(a < b) {
        a = b;
        return true;
    }
    return false;
}
 
template<class T>
inline bool chmin(T &a, T b) {
    if(a > b) {
        a = b;
        return true;
    }
    return false;
}

int main() {
  int N; cin >> N;
  vector<ll> r(N),c(N);
  rep(i,N) cin >> r[i] >> c[i];

  vector<vector<ll>> dp(N, vector<ll>(N,1e18));
  rep(i,N) dp[i][i] = 0;
  
  for (int j = 1; j < N; j++) {
    for (int i = 0; i < N-j; i++) {
      for (int k = i; k < i + j; k++) {
        chmin(dp[i][i+j],dp[i][k] + dp[k+1][i+j] + r[i] * c[k] * c[i+j]); 
      }
    }
  }

  cout << dp[0][N-1] << endl;
}

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

int main() {
    int n;
    scanf("%d", &n);

    int p[n+1], m[n][n];
    
    for (int i = 0; i < n; i++) {
        scanf("%d %d", &p[i], &p[i+1]);
    }

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

    for (int l = 1; l < n; l++) {
        for (int i = 0; i < n - l; i++) {
            int j = i + l;
            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] * p[k+1] * p[j+1]);
            }
            // printf("m[%d][%d] = %d\n", i, j, m[i][j]);
        }
        // printf("--\n");
    }
    printf("%d\n", m[0][n-1]);
    return 0;
}

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

#define INF (int)1e+9
using namespace std;

void dumpmat(vector<vector<int> >& a,int n){

  for( int i=1; i<=n; i++ ){
    for( int j=1; j<=n; j++ ){
      cout << a[i][j] << " ";
    }
    cout << "\n";
  }
  cout << "\n";
}

int main(){

  int n; cin >> n;
  vector<int> p(n+1);
  for(int i=0; i<n; i++) cin >> p[i] >> p[i+1];

  vector<vector<int> > m(n+1, vector<int>(n+1,INF));
  // dp[i][k] : i (0 <= i <= n-1)???????????? k (1 <= k <= n) ??????????????????????°????
  /*
  for(int i=0; i<=n; i++) m[i][1] = 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] + p[i-1]*p[k]*p[j]);
      }
      dumpmat(dp,n);
    }
  } 
  cout << dp[1][n] << endl;
*/
  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]);
      }
      //      dumpmat(m,n);
    }
  }

  cout << m[1][n] << endl;
  return 0; 
}

C++: #include <stdio.h>
#include <iostream>
#include <utility>
#include <algorithm>
#include <math.h>
#include <vector>
using namespace std;
#define inf pow(100, 4) + 1

int dp[100][100] = {};
int n;
int getMCM(int r[], int c[])
{
    int k;
    for (int i = 1; i < n; i++)
    {
        k = 0;
        for (int j = i; j < n; j++)
        {
            dp[k][j] = inf;
            for (int l = k; l < j; l++)
            {
                dp[k][j] = min(dp[k][j], dp[k][l] + dp[l + 1][j] + r[k] * c[j] * c[l]);
            }
            k++;
        }
    }
    return dp[0][n - 1];
}

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

    cout << getMCM(r, c) << "\n";
    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-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;
}