Go: package main

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

type Matrix struct {
	r int // num of row
	c int // num of column
}

type Range struct {
	start int // index, inclusive
	end   int // index, inclusive
}

func calcMultiplication(x, y Matrix) (Matrix, int) {
	if x.c != y.r {
		panic("cannnot calculate")
	}
	return Matrix{x.r, y.c}, x.r * y.c * x.c
}

func calcMinMatrixChainMultiplication(matrices []Matrix, r Range, memo map[Range]int) (Matrix, int) {
	if v, ok := memo[r]; ok {
		return Matrix{matrices[0].r, matrices[len(matrices)-1].c}, v
	}
	if len(matrices) == 0 {
		panic("must not be empty")
	} else if len(matrices) == 1 {
		return matrices[0], 0
	}

	var minCount int = math.MaxInt32

	for i := 0; i < len(matrices)-1; i++ {
		formerMatrices := matrices[:i+1]
		latterMatrices := matrices[i+1:]
		matF, countF := calcMinMatrixChainMultiplication(formerMatrices, Range{0, i}, memo)
		matL, countL := calcMinMatrixChainMultiplication(latterMatrices, Range{i + 1, len(matrices) - 1}, memo)
		_, countFL := calcMultiplication(matF, matL)
		count := countF + countL + countFL
		if count < minCount {
			minCount = count
		}
	}
	memo[r] = minCount
	return Matrix{matrices[0].r, matrices[len(matrices)-1].c}, minCount
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	sc.Split(bufio.ScanWords)
	n, _ := nextInt(sc)
	matrices := make([]Matrix, n)
	for i := 0; i < n; i++ {
		r, _ := nextInt(sc)
		c, _ := nextInt(sc)
		matrices[i] = Matrix{r, c}
	}
	memo := make(map[Range]int)
	_, resultCount := calcMinMatrixChainMultiplication(matrices, Range{0, len(matrices) - 1}, memo)
	fmt.Println(resultCount)
}

func nextInt(sc *bufio.Scanner) (int, error) {
	sc.Scan()
	return strconv.Atoi(sc.Text())
}

Python: N = int(input())
matrices = [tuple(map(int, input().split())) for _ in range(N)]
R, C = zip(*matrices)
dp = [[float('inf')] * N for _ in range(N)]
for i in range(N): dp[i][i] = 0
for l in range(1, N):
    for i in range(N-l):
        r, c = R[i], C[i+l]
        dp[i][i+l] = min(r * C[j] * c + dp[i][j] + dp[j+1][i+l] for j in range(i, i+l))
print(dp[0][N-1])

Python: def s():
 n=int(input())+1
 e=[input().split()for _  in[0]*~-n]
 p=[int(e[0][0])]+list(int(x[1])for x in e)
 m=[[0]*n for _ in[0]*n]
 for i in range(n):
  for r in range(n-i-1):
   c=r+i+1
   for j in range(r+1,c):
    x=m[r][j]+m[j][c]+p[r]*p[j]*p[c]
    if 1>m[r][c]or m[r][c]>x:m[r][c]=x
 print(m[r][c])
if'__main__'==__name__:s()

Python: n=int(input())
m={}
p=[]

for i in range(n+1):
    m[i]=[0 for j in range(n+1)]
for i in range(n):
    tmp=list(map(int,input().split()))
    if i==0:
        p.append(tmp[0])
        p.append(tmp[1])
    else:
        p.append(tmp[1])

for l in range(2,n+1):
    for i in range(1,n-l+2):
        j=i+l-1
        m[i][j]=10000000
        for k in range(i,j):
            m[i][j]=min(m[i][j],m[i][k]+m[k+1][j]+(p[i-1]*p[k]*p[j]))
            
print(m[1][n])

Python: def s():
 n=int(input())+1
 e=[input().split()for _  in[0]*~-n]
 p=[int(e[0][0])]+list(int(x[1])for x in e)
 m=[[0]*n for _ in[0]*n]
 for i in range(n):
  for r in range(n-i-1):
   c=r+i+1
   for j in range(r+1,c):
    x=m[r][j]+m[j][c]+p[r]*p[j]*p[c]
    if not 0<m[r][c]<=x:m[r][c]=x
 print(m[r][c])
if'__main__'==__name__:s()

Python: N = int(input())
for i in range(N):
    if i == 0:
        P = list(map(int, input().split()))
        continue
    P.append(int(input().split()[1]))

# dpテーブルの用意 minを取るときはinf埋めしておくと処理が楽になるしバグが見つかりやすい
INF = 2**32-1
dp = [[INF]*N for _ in range(N)]

# dpテーブルの初期化
# 対角成分0
for ij in range(N):
    dp[ij][ij] = 0
    
for l in range(1, N):
    for i in range(N-l):
        j = i+l
        for k in range(i,j):
            dp[i][j] = min(dp[i][k] + dp[k+1][j] + P[i]* P[j+1]*P[k+1], dp[i][j])
print(dp[0][-1])

Python: import sys
sys.setrecursionlimit(10**8)
def ii(): return int(sys.stdin.readline())
def mi(): return map(int, sys.stdin.readline().split())
def li(): return list(map(int, sys.stdin.readline().split()))
def li2(N): return [list(map(int, sys.stdin.readline().split())) for _ in range(N)]
def dp2(ini, i, j): return [[ini]*i for _ in range(j)]
def dp3(ini, i, j, k): return [[[ini]*i for _ in range(j)] for _ in range(k)]
#import bisect #bisect.bisect_left(B, a)
#from collections import defaultdict #d = defaultdict(int) d[key] += value
#from itertools import accumulate #list(accumulate(A))

N = ii()
l = li2(N)


'''
# メモ化再帰
dp = dp2(-1, N, N)
def rec(i, j):
    if dp[i][j] != -1:
        return dp[i][j]
    if i == j:
        dp[i][j] = 0
        return 0
    if j-i == 1:
        dp[i][j] = l[i][0] * l[i][1] * l[j][1]
        return dp[i][j]
    res = float('inf')
    for k in range(i, j):
        res = min(res, rec(i, k) + rec(k+1, j) + l[i][0] * l[k+1][0] * l[j][1])
    dp[i][j] = res
    return res

print(rec(0, N-1))
'''

# 2次元DP

dp = dp2(float('inf'), N, N)

for i in range(N):
    dp[i][i] = 0

for h in range(1, N):
    for i in range(N):
        if i+h < N:
            if h == 1:
                dp[i][i+h] = l[i][0] * l[i][1] * l[i+h][1]
            else:
                #dp[i][i+h] = dp[i][i+h-1] + l[i][0] * l[i+h][0] * l[i+h][1]
                for r in range(i, i+h):
                    dp[i][i+h] = min(dp[i][i+h], dp[i][r]+dp[r+1][i+h]+l[i][0]*l[r+1][0]*l[i+h][1])
#print(dp)
print(dp[0][N-1])

Python: n = int(input())
m = []


def memoize(f):
    memo = [[None] * n for _ in range(n)]
    for i in range(n):
        memo[i][i] = 0

    def main(b, e):
        if memo[b][e] is not None:
            return memo[b][e]
        result = memo[b][e] = f(b, e)
        return result

    return main


@memoize
def contract(b, e):
    return min(contract(b, i) + contract(i + 1, e) + m[b] * m[i + 1] * m[e + 1] for i in range(b, e))


r, c = map(int, input().split())
m.append(r)
m.append(c)
nc = n - 1
while nc:
    r, c = map(int, input().split())
    m.append(c)
    nc -= 1

print(contract(0, n - 1))

Python: INF = float("inf")
n = int(input())
f = lambda x: list(map(int, x.split()))
A = [0]
for i, a in enumerate(map(f, sys.stdin)):
    if i == 0:
        A.extend(a)
    else:
        A.append(a[1])
C = [[INF] * (n + 1) for _ in range(n + 1)]
for i in range(n + 1):
    C[i][i] = 0
for j in range(1, n):
    for i in range(1, n - j + 1):
        for k in range(i + 1, i + j + 1):
            cost = C[i][k - 1] + C[k][i + j] + A[i] * A[k] * A[i + j + 1]
            if cost < C[i][i + j]:
                C[i][i + j] = cost
print(C[1][n])

Python: n=int(input())
M=[list(map(int,input().split())) for _ in range(n)]

P=[M[0][0]]
for i in range(n):P.append(M[i][1])
DP=[[0 for _ in range(n)] for _ in range(n)]
for l in range(1,n):
    for i in range(n-l):
        j=i+l
        DP[i][j]=10**6
        for k in range(i,j):
            DP[i][j]=min(DP[i][j],DP[i][k]+DP[k+1][j]+P[i-1]*P[k]*P[j])
print(DP[0][-1])

Python: import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

N = int(input())
RC = [list(map(int, input().split())) for _ in range(N)]

memo = [[-1] * (N + 1) for _ in range(N + 1)]
inf = 10**18


def mult(l, r):
    """
    半開区間[l, r)
    """
    if memo[l][r] != -1:
        return memo[l][r]
    if r - l <= 1:
        memo[l][r] = 0
        return 0

    res = inf
    for m in range(l + 1, r):
        prod = RC[l][0] * RC[m - 1][1] * RC[r - 1][1]
        tmp = mult(l, m) + mult(m, r) + prod
        res = min(res, tmp)
    memo[l][r] = res
    return res


ans = mult(0, N)
print(ans)

Python: n = int(input())
p = [item for sublist in [[int(input().split()[1])] if i != 0 else list(map(int, input().split())) for i in range(n)] for item in sublist]

def memolize(f):
    cache = {}

    def helper(x, y):
        if (x, y) not in cache:
            cache[(x, y)] = f(x, y)
        return cache[(x, y)]
    return helper

@memolize
def calcMatrixOrder(i, j):
    if i == j :
        return 0
    return min([calcMatrixOrder(i, k) + calcMatrixOrder(k + 1, j) + p[i]*p[k+1]*p[j + 1] for k in range(i, j)])

print(calcMatrixOrder(0, n - 1))