Go: package main

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

const N = 100

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

func answer(reader io.Reader) string {
	sc := bufio.NewScanner(reader)
	sc.Split(bufio.ScanWords)

	sc.Scan()
	n, _ := strconv.Atoi(sc.Text())

	var p [N]int
	var m [N + 1][N + 1]int
	for i := 1; i <= n; i++ {
		sc.Scan()
		p[i-1], _ = strconv.Atoi(sc.Text())
		sc.Scan()
		p[i], _ = strconv.Atoi(sc.Text())
	}

	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])
			}
		}
	}

	return fmt.Sprintf("%d", m[1][n])
}

func main() {
	fmt.Println(answer(os.Stdin))
}

C++: #include <iostream>
#include <array>
#include <limits>

using namespace std;

struct MatrixDims {
    int row;
    int col;
    MatrixDims() {}
    MatrixDims(int row, int col) : row(row), col(col) {}
};

array<MatrixDims, 100> matrix_dims;
array<array<int, 100>, 100> dp;

int get_min(int row, int col) {
    int min = numeric_limits<int>::max();
    for (int j = row; j < col; ++j) {
        int sum = dp[row][j] + dp[j+1][col] + matrix_dims[row].row * matrix_dims[j].col * matrix_dims[col].col;
        if (sum < min) min = sum;
    }
    return min;
}

int main()
{
    int n;
    cin >>  n;
    for (int i = 0; i < n; ++i) {
        int row, col;
        cin >> row >> col;
        matrix_dims[i] = MatrixDims(row, col);
    }
    dp.fill({});
    
    for (int endpt = 1; endpt < n; ++endpt) {
        for (int diag_i = 0; (endpt + diag_i) < n; ++diag_i) {
            dp[diag_i][diag_i + endpt] = get_min(diag_i, endpt + diag_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 - 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;

#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)

const int MAX_N = 100;
vector<int> r(MAX_N);
vector<int> c(MAX_N);
//DP????????????
//DP[i,j]???i????????????j????????????????????????????????£?????¨??????????°????????????°
vector<vector<int> > DP(MAX_N, vector<int>(MAX_N,-1));

int dev(int k, int l){
	//?¨????????????????????????´???
	if(DP[k][l]<0){
		int mini=INT_MAX;
		if(k==l){
			mini=0;
		}
		FOR(i,0,l-k){
			int left = dev(k,k+i);
			int right = dev(k+i+1,l);
			mini=min(mini, left + right + r[k]*c[k+i]*c[l]);
		}
		DP[k][l]=mini;
	}
	return DP[k][l];	
}

int main(){
	int n;
	cin>>n;
	REP(i,n){
		cin>>r[i]>>c[i];
	}
	int res = dev(0,n-1);
	/*
	REP(i,n){
		REP(j,n){
			cout<<"["<<i<<"]["<<j<<"] "<<DP[i][j]<<endl;
		}
	}*/
	cout<<res<<endl;
	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;
}

C++: #include<bits/stdc++.h>

using namespace std;

struct Matrix
{
	int r,c;
};

int main()
{
	Matrix Mat[100]; 
	int n,dp[100][100];
	memset(dp,0,sizeof(dp));
	scanf("%d",&n);
	for(int i=0;i<n;i++)
		scanf("%d%d",&Mat[i].r,&Mat[i].c);
	for(int i=1;i<n;i++)
		for(int j=0;i+j<n;j++)
		{
			dp[j][i+j]=INT_MAX;
			for(int k=j;k<i+j;k++)
				dp[j][i+j]=min(dp[j][i+j],dp[j][k]+dp[k+1][i+j]+Mat[j].r*Mat[i+j].c*Mat[k].c);
		}
	printf("%d\n",dp[0][n-1]);
	return 0;
}

C++: #include <bits/stdc++.h>
#define int long long
#define double long double
#define rep(i, a, n) for(int i = (int)(a);(i) < (int)(n);++(i))
#define repe(i, a, n) for(int i = (int)(a);(i) <= (int)(n);++(i))
#define repif(i, a, x) for(int i = (int)(a);(x);++(i))
#define repr(i, a, n) for(int i = ((int)(a)-1);(i) >= (int)(n);--(i))
#define reper(i, a, n) for(int i = (int)(a);(i) >= (int)(n);--(i))
#define SZ(x) ((int)(x).size())
#define ALL(x) begin(x), end(x)
#define CEIL(x) ((int)ceil(((double)x)))
#define POW(x, y) ((int)pow(x, y))
#define UNIQUE(x) (x).erase(unique(ALL((x))), end(x))
#define gcd(x, y) __gcd(x, y)
#define lcm(x, y) ((x)/gcd(x,y)*(y))
#define isin(x, l, r) ((l) <= (x) and (x) < (r))
#define fcout(n) cout << fixed << setprecision(n)
#define rcout(n) cout << right << setw(n)
#define pb push_back
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define PI (acosl(-1))
#define EPS (1e-10)
#define INF LLONG_MAX
#define INF32 INT32_MAX
#define MOD 1000000007LL
using namespace std;
using VI = vector<int>;
using PII = pair<int, int>;
using TIII = tuple<int, int, int>;
using VPII = vector<PII>;
using VTIII = vector<TIII>;
using Complex = complex<double>;
template<typename T, template<typename> typename C = less> using PQ = priority_queue<T, vector<T>, C<T>>;
template<typename T> inline bool chmax(T& a, const T& b, bool t = false){ if(a<b or (t and a == b)){ a=b; return true; } return false; }
template<typename T> inline bool chmin(T& a, const T& b, bool t = false){ if(a>b or (t and a == b)){ a=b; return true; } return false; }


int n;
int r[110];
int c[110];
int dp[110][110];


signed main(){
    cin >> n;
    rep(i, 0, n) cin >> r[i] >> c[i];

    rep(i, 0, n) rep(j, 0, n) if(i != j) dp[i][j] = INF;
    rep(l, 1, n) rep(i, 0, n-l) rep(j, i, i+l) chmin(dp[i][i+l], dp[i][j]+dp[j+1][i+l]+r[i]*c[j]*c[i+l]);

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

    return 0;
}