Go: package main

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

const (
	initialBufSize = 100000
	maxBufSize     = 1000000
)

var sc *bufio.Scanner

func initScanner(r io.Reader) *bufio.Scanner {
	buf := make([]byte, initialBufSize)

	sc := bufio.NewScanner(r)
	sc.Buffer(buf, maxBufSize)
	sc.Split(bufio.ScanWords) // bufio.ScanLines
	return sc
}

func main() {
	sc = initScanner(os.Stdin)
	fmt.Println(resolve(parseProblem()))
}

type matrixSize struct{ row, col int }

func calcNum(i, j matrixSize) int {
	return i.row * j.col * i.col
}

func parseProblem() (int, []matrixSize) {
	n := scanInt(sc)
	sizes := make([]matrixSize, n)
	for i := 0; i < n; i++ {
		sizes[i] = matrixSize{row: scanInt(sc), col: scanInt(sc)}
	}
	return n, sizes
}

var dp [][]int

func initDP(n int) {
	dp = make([][]int, n+1)
	for i := 0; i < len(dp); i++ {
		dp[i] = make([]int, n+1)
		for j := 0; j < len(dp[i]); j++ {
			dp[i][j] = math.MaxInt64
		}
	}
}

func resolve(n int, sizes []matrixSize) int {
	// TODO 復習
	initDP(n)
	_rec(sizes, 0, n)
	return dp[0][n]
}

func _rec(sizes []matrixSize, l, r int) int {
	if dp[l][r] != math.MaxInt64 {
		return dp[l][r]
	}
	if r-l <= 1 {
		dp[l][r] = 0
		return 0
	}
	num := math.MaxInt64
	for i := l + 1; i < r; i++ {
		v := _rec(sizes, l, i) + _rec(sizes, i, r) + calcNum(matrixSize{sizes[l].row, sizes[i].row}, matrixSize{sizes[i].row, sizes[r-1].col})
		if v < num {
			num = v
		}
	}
	dp[l][r] = num
	return dp[l][r]
}

// snip-scan-funcs
func scanInt(sc *bufio.Scanner) int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return int(i)
}
func scanString(sc *bufio.Scanner) string {
	sc.Scan()
	return sc.Text()
}

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++)
    x{
      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 <string>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cassert>
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define rep(i,n) FOR(i,0,n)
#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define vint vector<int>
#define vdouble vector<double>
#define vstring vector<string>
using namespace std;

#include<map>
#include<set>
#include<queue>

typedef long long ll;
typedef unsigned long long ull;

const int MAX_N = 1000000;

int N;
int C[101];
int dp[100][100];
const int INFTY = (1 << 30);

int main() {
	cin >> N;
	rep(i, N) cin >> C[i] >> C[i+1];

	rep(y, N) rep(x , N) dp[y][x] = INFTY;

	rep(y, N) dp[y][y] = 0;

	for(int d = 1; d < N; d++)
		for(int y = 0; d + y < N; y++){
			for (int dd = 0; dd < d; dd++) {
				int m1_s = y;
				int m1_e = y+dd;
				int m2_s = y+dd+1;
				int m2_e = y+d;

				int cl = C[m1_s] * C[m2_s] * C[m2_e + 1];
				dp[m1_s][m2_e] = min(dp[m1_s][m2_e], dp[m1_s][m1_e] + dp[m2_s][m2_e] + cl);
			}
		}
	cout << dp[0][N-1] << endl;

}

C++: #include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <algorithm>
#include <array>

using namespace std;
int INF = 100000000;

struct Matrix { int row, col; };

int getMinMCM(const vector<Matrix>& matVec) {
	const size_t n = matVec.size();
	//table(i,num)は、与えられた行列積のindex=i(0始まり）の行列から、num個先の行列までの積についてのMCM最小値を記録する
	//（ table.at(0).at(n - 1) が求まると、与えられた行列積全体のMCMが求まる ）
	vector< vector<int> > table(n, vector<int>(n, 0));
	for (size_t num = 1; num != n; ++num) {
		const size_t end = n - num;
		for (size_t i = 0; i != end; ++i) {
			const Matrix& matI = matVec.at(i);
			const Matrix& matNum = matVec.at(i+num);
			int& target = table.at(i).at(num);
			target = INF;
			int end2 = i + num;
			for (int j = i; j != end2; ++j) {
				const Matrix& matJ = matVec.at(j);
				target = min(target, matI.row * matJ.col * matNum.col + table.at(i).at(j - i) + table.at(j + 1).at(num+i-j-1));
			}

		}
	}
	return table.at(0).at(n - 1);
}

template<typename T>
void execute(T& cin) {
	int n;
	cin >> n;
	vector<Matrix> m(n);
	for (auto& matrix : m)cin >> matrix.row >> matrix.col;
	cout << getMinMCM(m) << endl;

}

int main()
{
	execute(cin);

	return 0;
}

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

constexpr int MAXN = 100;
int C[MAXN + 1][MAXN + 1];
int M[MAXN][2];

int main() {
    int n;
    std::cin >> n;
    for (int i = 0; i < n; i++) {
        std::cin >> M[i][0] >> M[i][1];
    }

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

    for (int j = 1; j < n; j++) {
        for (int i = j - 1; i >= 0; i--) {
            C[i][j] = std::numeric_limits<int>::max();
            for (int k = i; k < j; k++) {
                C[i][j] = std::min(C[i][j], C[i][k] + C[k+1][j] + M[i][0] * M[j][1] * M[k][1]);
            }
        }
    }
    std::cout << C[0][n-1] << std::endl;
}

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

using namespace std;

#define MAX_MEMO_SIZE 101

static size_t memo[MAX_MEMO_SIZE][MAX_MEMO_SIZE];

size_t matrix_chain_multiplication(size_t num, vector<uint32_t> matrix)
{
  for (uint32_t i = 0; i <= num; i++) {
    for (uint32_t j = i; j <= num; j++) {
      if (i == j) {
        memo[i][j] = 0;
      } else {
        size_t size = SIZE_MAX;

        for (uint32_t k = i; k <= j; j++) {
          size = min(size, memo[i][k] + memo[k + 1][j] + matrix[i - 1] * matrix[k] * matrix[j]);
        }
        memo[i][j] = size;
      }
    }
  }

  return memo[num][num];
}

#include <iostream>

static vector<uint32_t> matrix;

int32_t main()
{
  uint32_t num;
  cin >> num;

  for (uint32_t i = 0; i < num; i++) {
    uint32_t num1, num2;
    if (i == 0) {
      cin >> num1 >> num2;
      matrix.push_back(num1);
      matrix.push_back(num2);
    } else {
      cin >> num1 >> num2;
      matrix.push_back(num2);
    }
  }
  cout << matrix_chain_multiplication(num, matrix);

  return 0;
}

C++: #include <iostream>
#include <algorithm>
const int MAX_N = 100;
const int INF = 999999999;
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;
}

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

#define INF 1<<28

using namespace std;

int n, m[100][100], M[100][2];

int Multi(int a, int b) {
	if (m[a][b] != INF) return m[a][b];
	else if (b - a == 1) m[a][b] = M[a][0] * M[a][1] * M[b][1];
	else {
		for (int i = 1; i < b - a - 1; i++) {
			m[a][b] = min(m[a][b], Multi(a, a + i) + Multi(a + i + 1, b) + M[a][0] * M[a + i][1] * M[b][1]);
		}
		m[a][b] = min(m[a][b], Multi(a, b - 1) + M[a][0] * M[b][0] * M[b][1]);
		m[a][b] = min(m[a][b], Multi(a + 1, b) + M[a][0] * M[a][1] * M[b][1]);
	}
	return m[a][b];
}

int main() {
	cin >> n;
	for (int i = 0; i < n; i++) cin >> M[i][0] >> M[i][1];
	for (int i = 0; i < n - 1; i++) {
		for (int j = i + 1; j < n; j++) m[i][j] = INF;
	}
	cout << Multi(0, n - 1) << endl;
}