Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func nextString() string {
	scanner.Scan()
	return scanner.Text()
}

func nextInt() int {
	n, err := strconv.Atoi(nextString())
	if err != nil {
		fmt.Printf("strconv.Atoi failed: %v\n", err)
	}
	return n
}

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

func stringifyArray(arr []int) string {
	return strings.TrimRight(fmt.Sprintf("%+v", arr)[1:], "]")
}

func main() {
	scanner.Split(bufio.ScanWords)

	n := nextInt()
	m := make([][]int, n)
	sizes := make([][]int, n)
	for i := 0; i < n; i++ {
		sizes[i] = []int{nextInt(), nextInt()}
		m[i] = make([]int, n)
	}
	// fmt.Println(sizes)

	for w := 1; w < n; w++ {
		for i := 0; i < n-w; i++ {
			j := i + w
			minBetweenIandJ := 10000000
			for k := i; k < j; k++ {
				// fmt.Println(i, j, k, m[i][k], m[k+1][j], sizes[i][0]*sizes[k][1]*sizes[j][1])
				minBetweenIandJ = min(minBetweenIandJ, m[i][k]+m[k+1][j]+sizes[i][0]*sizes[k][1]*sizes[j][1])
			}
			m[i][j] = minBetweenIandJ
		}
	}
	// for i := 0; i < len(m); i++ {
	// 	fmt.Println(stringifyArray(m[i]))
	// }
	fmt.Println(m[0][n-1])
}

C++: #include<cstdio>
#include<cstring>

#define MIN(X,Y) ((X)>(Y)?(Y):(X))

int r[1000], c[1000];
int dp[200][200];

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

    for(int i=0; i<n; i++)
        scanf("%d%d",&r[i],&c[i]);

    memset(dp, 0x7F, sizeof(dp));

    for(int i=0; i<n; i++)
        dp[i][i] = 0;
    for(int i=0; i<n-1; i++)
        dp[i][i+1] = r[i]*c[i+1]*r[i+1];

    for(int d=2; d<n; d++)
        for(int i=0; i+d<n; i++)
            for(int j=i; j<i+d; j++)
                dp[i][i+d] = MIN(dp[i][i+d], dp[i][j]+r[i]*c[i+d]*r[j+1]+dp[j+1][i+d]);

    printf("%d\n",dp[0][n-1]);
    return 0;
}

C++: #include <cstdio>
int N, MEMO[100][100], V[100][100];
struct info {
    int r;
    int c;
};
struct info MAT[100];
int DP(int i, int j);
void input(void);
int main(void){
    //freopen("in.txt", "r", stdin);
    input();
    printf("%d\n", DP(0, N - 1));
    return 0;
}
int DP(int i, int j){
    if (V[i][j] == 1) return MEMO[i][j];
    V[i][j] = 1;
    if (i >= j) return 0;
    int min = 987654321;
    for(int k = i; k < j; k++){
        int cnd = DP(i, k) + DP(k + 1, j) + MAT[i].r * MAT[k].c * MAT[j].c;
        if (cnd < min) min = cnd;
    }
    MEMO[i][j] = min;
    return min;
}
void input(void){
    scanf("%d", &N);
    for(int i = 0; i < N; i++) scanf("%d%d", &MAT[i].r, &MAT[i].c);
}

C++: #include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
static const int Infinity=2000000000;

int main(){
    int n;cin>>n;
    int P[n+1],DP[n][n];
    rep(i,n){
        scanf("%d %d",&P[i],&P[i+1]);
    }
    rep(i,n){
        DP[i][i]=0;
    }
    for(int i=1;i<n;i++){
        for(int j=0;j+i<n;j++){
            int minc=Infinity;
            for(int k=j;k<j+i;k++){
                minc=min(minc,DP[j][k]+DP[k+1][j+i]+P[j]*P[k+1]*P[j+i+1]);
            }
            DP[j][j+i]=minc;
        }
    }
    cout<<DP[0][n-1]<<endl;
}

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

ll rec(int left, int right, vector<vector<ll> > &dp, vector<int> &R, vector<int> &C) {
    int N = dp.size();
    if (dp.at(left).at(right) != LLONG_MAX) {
        return dp.at(left).at(right);
    }
    if (left == right) {
        return dp.at(left).at(right) = 0;
    }
    ll res = LLONG_MAX;
    for (int i = left; i < right; ++i) {
        res = min(res, rec(left, i, dp, R, C) + rec(i + 1, right, dp, R, C) + 1LL * R.at(left) * C.at(i) * C.at(right));
    }
    return dp.at(left).at(right) = res;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int N;
    cin >> N;
    vector<int> R(N), C(N);
    for (int i = 0; i < N; ++i) {
        cin >> R.at(i) >> C.at(i);
    }

    vector<vector<ll> > dp(N, vector<ll>(N, LLONG_MAX));

    cout << rec(0, N - 1, dp, R, C) << endl;

    return 0;
}

C++: #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#define MAX 100
int min(int,int);
int p[MAX+1]={},m[MAX+1][MAX+1]={};

int min(int n1,int n2){
  if(n1>n2) return n2;
  else return n1;
}

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

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

int main()
{
	int n;
	int v[101];
	long m[100][100];
	const long nil = 999999999;

	cin >> n;

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

	for (int i = 0; i < 100; i++)
		for (int j = 0; j < 100; j++)
			if (i == j)
				m[i][j] = 0;
			else
				m[i][j] = nil;
	
	for(int i = n - 2; i > -1; i--)
		for(int j = i + 1; j < n; j++)
			for (int k = i; k < n; k++)
				m[i][j] = min(m[i][j], m[i][k] + m[k + 1][j] + v[i] * v[k + 1] * v[j + 1]);

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

	return 0;
}

C++: #include <cstdio>

int main(void) {
    int n, u, k, v, i, j;
    scanf("%d", &n);
    int m[n+1][n+1];

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

    for (i = 0; i < n; i++) {
        scanf("%d %d", &u, &k);
        for (j = 0; j < k; j++) {
            scanf("%d", &v);
            m[u][v] = 1;
        }
    }

    for (i = 1; i <= n; i++) {
        for (j = 1; j <= n; j++) {
            if (j-1) printf(" ");
            printf("%d", m[i][j]);
        }
        printf("\n");
    }

    return 0;
}

C++: #include<cstdio>
#include<algorithm>
using namespace std;
static const int N=100;
int main(){
  int n,p[N+1],m[N+1][N+1];
  scanf("%d",n);;
  for(int i=1;i<=n;i++)
    scanf("%d%d",&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+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]);
      }
    }
  }
  printf("%d\n",m[1][n]);
  return 0;
}

C++: #include <iostream>
#include <string>
#include <stack>
#include <queue>
#include <vector>
#include <list>
#include <set>
#include <map>
#include <algorithm>

#include <cstdio>

using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define rep1(i, s, n) for (int i = (s); i <= (n); i++)
#define rrep(i, n) for (int i = (n) - 1; i >= 0; i--)
#define rrep1(i, s, n) for (int i = (s); i >= (n); i--)
#define print_array(ary, size) cout << ary[0]; rep1(i, 1, size - 1) cout << ' ' << ary[i]; cout << endl;
typedef long long ll;
typedef unsigned long long ull;

int r[100];
int c[100];
int cost[100][100];

int getMulMin(int from, int to)
{
	int ret = 100000000;
	int cand;
	int div = to - from;

	if (cost[from][to] != -1) return cost[from][to];
	else if (div == 0) {
		cost[from][to] = 0;
		return 0;
	}

	rep(i, div) {
		cand = getMulMin(from, from + i) + getMulMin(from + i + 1, to) + r[from] * c[from + i] * c[to];
		ret = min(ret, cand);
	}

	cost[from][to] = ret;

	return ret;
}

int main()
{
	int n;
	int ans;

	rep(i, 100) {
		rep(j, 100) cost[i][j] = -1;
	}

	cin >> n;
	rep(i, n) cin >> r[i] >> c[i];

	ans = getMulMin(0, n - 1);
	cout << ans << endl;

	return 0;
}