Go: package main

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

// I/O
type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner() *Scanner {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	sc.Buffer(make([]byte, 1024), int(1e+9))
	return &Scanner{sc}
}

func (s *Scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func (s *Scanner) nextInt() int {
	i, e := strconv.Atoi(s.nextStr())
	if e != nil {
		panic(e)
	}
	return i
}

func (s *Scanner) nextFloat() float64 {
	f, e := strconv.ParseFloat(s.nextStr(), 64)
	if e != nil {
		panic(e)
	}
	return f
}

func (s *Scanner) nextRuneSlice() []rune {
	return []rune(s.nextStr())
}

func (s *Scanner) nextIntSlice(n int) []int {
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextInt()
	}
	return res
}

func (s *Scanner) nextFloatSlice(n int) []float64 {
	res := make([]float64, n)
	for i := 0; i < n; i++ {
		res[i] = s.nextFloat()
	}
	return res
}

// Arithmetic
func max(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m < i {
			m = i
		}
	}
	return m
}

func min(nums ...int) int {
	m := nums[0]
	for _, i := range nums {
		if m > i {
			m = i
		}
	}
	return m
}

func abs(x int) int {
	if x > 0 {
		return x
	}
	return -x
}

func pow(x, y int) int {
	res := 1
	for i := 0; i < y; i++ {
		res *= x
	}
	return res
}

func ceil(a, b int) int {
	if a%b == 0 {
		return a / b
	} else {
		return a/b + 1
	}
}

// Sort
type RuneSlice []rune

func (a RuneSlice) Len() int           { return len(a) }
func (a RuneSlice) Less(i, j int) bool { return a[i] < a[j] }
func (a RuneSlice) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }

// Main
func main() {
	sc := NewScanner()
	wtr := bufio.NewWriter(os.Stdout)
	N := sc.nextInt()
	p := make([]int, N+1)
	dp := make([][]int, N+1)
	for i, _ := range dp {
		dp[i] = make([]int, N+1)
	}
	for i := 0; i < N; i++ {
		p[i] = sc.nextInt()
		p[i+1] = sc.nextInt()
	}
	for i := 1; i <= N; i++ {
		dp[i][i] = 0
	}
	for l := 2; l <= N; l++ {
		for i := 1; i <= N-l+1; i++ {
			j := i + l - 1
			dp[i][j] = 1 << 60
			for 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])
			}
		}
	}

	fmt.Fprintln(wtr, dp[1][N])
	wtr.Flush()
}

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

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 ( 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;

int main() {
   int n;
   cin >> n;
   int r[n+1],c[n+1];
   for (int i=1; i<n+1; i++) {
       cin >> r[i] >> c[i];
   }
   int dp[n+1][n+1];
   memset(dp,0,sizeof(dp));
   for (int i=1; i<=n; i++) {
       for (int j=1; j<=i; j++) {
           if (j==1) {
               continue;
           }
           if (j==2) {
               dp[i][j]=r[i-1]*r[i]*c[i];continue;
           }
           int m;
           for (int k=1; k<j; k++) {
               if (k==1) {
                   m=dp[i][j-1]+r[i-j+1]*c[i-j+1]*c[i];
               }
               else m=min(m,dp[i-j+k][k]+dp[i][j-k]+r[i-j+1]*c[i-j+k]*c[i]);
           }
           dp[i][j]=m;
       }
   }
   cout << dp[n][n] << 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 - 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 <iostream>
#include <algorithm>
using namespace std;

static const int N = 1000;

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-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 <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>

using namespace std;
const int maxn=100+10;
const int INF=(1<<21);
int n;
int p[maxn];
int dp[maxn][maxn];
int main()
{
//    freopen("in.txt","r",stdin);
    scanf("%d",&n);
    for(int i=0; i<n; i++)
    {
        scanf("%d%d",&p[i],&p[i+1]);
    }

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

    }
    for(int len=2;len<=n;len++)
    {
        for(int i=0;i<n-len+1;i++)
        {
            int j=i+len-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]+p[i]*p[k+1]*p[j+1]);
            }
        }
    }
    printf("%d\n",dp[0][n-1]);

    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;

const ll INF = 1001001001001001;

int n;
ll r[111], c[111];
ll dp[111][111]; // dp[le][ri] = [le, ri) の最小回数

ll rec(int le, int ri) {
    if (dp[le][ri] != INF) return dp[le][ri];
    if (ri - le - 2 == 0) {
        return dp[le][ri] = min(dp[le][ri], r[le] * c[le] * c[ri - 1]);
    }
    if (le + 1 < ri - 1) dp[le][ri] = min(dp[le][ri], rec(le + 1, ri) + r[le] * c[le] * c[ri - 1]);
    if (le < ri - 2) dp[le][ri] = min(dp[le][ri], rec(le, ri - 1) + r[le] * c[ri - 2] * c[ri - 1]);
    for (int md = le + 1; md < ri - 1; md++) {
        dp[le][ri] = min(dp[le][ri], rec(le, md) + rec(md, ri) + r[le] * c[md - 1] * c[ri - 1]);
    }
    return dp[le][ri];
}

int main() {
    cin >> n;
    for (int i = 0; i < n; i++) cin >> r[i] >> c[i];
    for (int i = 0; i < 111; i++) {
        for (int j = 0; j < 111; j++) {
            dp[i][j] = INF;
        }
    }
    if (n == 1) {
        cout << 0 << endl;
        return 0;
    }
    rec(0, n);
    cout << dp[0][n] << endl;
}

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

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;

static const long N = 100;

int main(){
	long n, p[N + 1], m[N + 1][N + 1];
	cin >> n;
	for (long i = 1; i <= n; i++){
		cin >> p[i - 1] >> p[i];
	}

	for (long i = 1; i <= n; i++) m[i][i] = 0;
	for (long l = 2; l <= n; l++){
		for (long i = 1; i <= n - l + 1; i++){
			long j = i + l - 1;
			m[i][j] = (1 << 21);
			for (long k = 0; k <= j - 1; k++){
				m[i][j] = min(m[i][j], m[i][k] + m[i][k] + m[k + 1][j] + p[i - 1] * p[k] * p[j]);
			}
		}
	}

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

	return 0;
}