Go: package main

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

func getScanner(fp *os.File) *bufio.Scanner {
	scanner := bufio.NewScanner(fp)
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 500001), 500000)
	return scanner
}

func getNextString(scanner *bufio.Scanner) string {
	scanner.Scan()
	return scanner.Text()
}

func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}

func main() {
	fp := os.Stdin
	if len(os.Args) > 1 {
		fp, _ = os.Open(os.Args[1])
	}

	scanner := getScanner(fp)
	writer := bufio.NewWriter(os.Stdout)

	n := getNextInt(scanner)
	mm := make([]int, n+1)
	dp := make([][]int, n+1)
	for i := 0; i <= n; i++ {
		dp[i] = make([]int, n+1)
	}
	for i := 0; i < n; i++ {
		mm[i] = getNextInt(scanner)
		mm[i+1] = getNextInt(scanner)
	}

	for l := 2; l <= n; l++ {
		for i := 1; i <= n-l+1; i++ {
			j := i + l - 1
			for k := i; k <= j-1; k++ {
				d := dp[i][k] + dp[k+1][j] + mm[i-1]*mm[k]*mm[j]
				if dp[i][j] == 0 || dp[i][j] > d {
					dp[i][j] = d
				}
			}
		}
	}

	fmt.Fprintln(writer, dp[1][n])

	writer.Flush()
}

Python: # -*- coding: utf-8 -*-

import random
import sys
import os
import pprint


"""Matrix Chain Multiplication"""

#fd = os.open('ALDS1_10_B.txt', os.O_RDONLY)
#os.dup2(fd, sys.stdin.fileno())

n = int(input())
col = [0] * (n + 1)
for i in range(n):
    row, column = map(int, input().split())
    col[i] = row
    col[i+1] = column

memo = [[0 for i in range(n+1)] for j in range(n+1)]
#pprint.pprint(memo)

for length in range(2, n+1):
    for start_index in range(1, n - length + 2):
        end_index = start_index + length - 1
        candidates = []
        for split_index in range(start_index, end_index):
            left = memo[start_index][split_index]
            right = memo[split_index + 1][end_index]
            plus = col[start_index - 1] * col[split_index] * col[end_index]
            candidates.append(left + plus + right)

        memo[start_index][end_index] = min(candidates)
        #print('memo', start_index, end_index, memo[start_index][end_index])

#pprint.pprint(memo)
print(memo[1][n])

Python: INF = 10**20
n = int(input())
nlist = []
all_mat = []
for i in range(n):
    a,b = map(int, input().split())
    all_mat.append((a,b))
    if (i == 0):
        nlist = [a,b]
    else:
        nlist.append(b)
        
def cost1(nlist):
    if len(nlist) == 0:
        return 0
    m = min(nlist)
    cost = 0
    mid = nlist.index(m)
    a = nlist[:mid]
    b = nlist[mid+1:]
    while (len(a)>1 and len(a) !=0):
        for i in range(len(a)-1):
            cost += a.pop()*a[-1]
            #print(a)
    while (len(b)>1 and len(b) !=0):
        b.reverse()
        for i in range(len(b)-1):
            cost += b.pop()*b[-1]
            #print(b)
    if (len(a) == 1 and len(b) == 1):
        cost += a.pop()*b.pop()
        #print(a,b)
    cost *= m
    return cost
#[34, 44, 13, 30]
def cost2(nlist, mm):
    if len(nlist) == 0:
        return 0
    m = min(nlist)
    cost = 0
    mid = nlist.index(m)
    a = nlist[:mid+1]
    #print(a)
    b = nlist[mid:]
    #print(b)
    while (len(a)>1 and len(a) !=0):
        a.reverse()
        for i in range(len(a)-1):
            cost += a.pop()*a[-1]
            #print(a)
    while (len(b)>1 and len(b) !=0):
        for i in range(len(b)-1):
            cost += b.pop()*b[-1]
            #print(b)
    if (len(a) == 1 and len(b) == 1):
        cost += m*mm
        #print(a,b)
    cost *= mm
    return cost

copy = nlist[:]
m = min(nlist)
#print(nlist)
c = nlist.count(m)
cost = 0
if (c == 1):
    cost = cost1(nlist)
elif (c >= 2):
    cc = 1
    cut_index = [0]
    mcount = nlist.count(m)
    for i in range(mcount):
        cut_index.append(nlist.index(m))
        nlist.remove(m)
    cut = []
    for i in range(mcount):
        cut.append(nlist[cut_index[i]:cut_index[i+1]])
    cut.append(nlist[cut_index[-1]:])
    #print(cut)
    co1 = cut[0] +[m]+ cut[-1]
    cost += cost1(co1)
    for co2 in cut[1:-1]:
        #print(co2)
        cost += cost2(co2,m)
    co3 = cut[0]+cut[-1]
    if (len(co3)>1):
        cost += (len(cut)-2)*m*min(co3)
print(cost)

Python: n = int(input())

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

for l in range(1,n):
    for i in range(0,n-l):
        j = i + l
        m[i][j]= float("inf")
        for k in range(i,j):
            m[i][j] = min(m[i][j],m[i][k] + m[k+1][j] + p[i]*p[k+1]*p[j+1])


print(m[0][n-1])

Python: import sys

N = int(input())
R = [0]*N
C = [0]*N
for i in range(N):
    R[i], C[i] = map(int, input().split())

INF = 10**18
m = [[INF]*N for i in range(N)]
for i in range(N):
    m[i][i] = 0
for l in range(1, N):
    for i in range(N-l):
        a0 = R[i]
        c0 = C[i+l]
        m[i][i+l] = min(a0*C[j]*c0 + m[i][j] + m[j+1][i+l] for j in range(i, i+l))
print(m[0][N-1])

Python: n = int(input())
nums = []
for _ in range(n):
    nums.append(tuple(map(int,input().split())))
# print(nums)
dp = [[10**9]*n for _ in range(n)]
for i in range(n):
    dp[i][i] = 0
# for i in range(n):
#     print(*dp[i])
for l in range(2,n+1):
    for i in range(n-l+1):
        for k in range(l-1):
            # print(l,i,k,dp[i][i+k],dp[i+k+1][i+l-1])
            dp[i][i+l-1] = min(dp[i][i+l-1],dp[i][i+k] + dp[i+k+1][i+l-1] + nums[i][0]*nums[i+k][1]*nums[i+l-1][1])
print(dp[0][n-1])
# for i in range(n):
#     print(*dp[i])

Python: def main():
    from functools import lru_cache
    import sys
    input=sys.stdin.readline
    sys.setrecursionlimit(100000000)
    INF=10**9
    n=int(input())
    M=[list(map(int,input().split())) for _ in range(n)]
   
    @lru_cache(maxsize=None)
    def dp(i,j):
        if i+1==j:
            return 0
        else:
            ans=INF
            for k in range(i+1,j):
                ans=min(ans,dp(i,k)+dp(k,j)+M[i][0]*M[k][0]*M[j-1][1])
            return ans
    print(dp(0,n))

if __name__=='__main__':
    main()

Python: # -*- coding: utf-8 -*-
"""
Created on Fri Mar 22 14:15:50 2019

@author: Yamazaki Kenichi
"""

n = int(input())
A = [list(map(int,input().split())) for i in range(n)]
B = [A[0][0]]
for c in A:
    B += [c[1]]

T = [[0 for i in range(n)] for i in range(n)]
for i in range(1,n):
    for j in range(n-i):
        if i == 1:
            T[i][j] = B[j]*B[j+1]*B[j+2]
            continue
        temp = 10**6
        for k in range(1,i+1):
             temp = min(temp,
                        T[i-k][j] + T[k-1][j+(i-k)+1] + B[j]*B[j+i-k+1]*B[j+i+1])
        T[i][j] = temp
print(T[n-1][0])

Python: if'__main__'==__name__:s()
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 l in range(2,n):
  for i in range(1,n-l+1):
   j=i+l-1;m[i][j]=1e6
   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-1])

Python: n = int(input())
P = list(map(int,input().split()))
for _ in range(n-1):
    P.append(int(input().split()[1]))

INF = 10**18
dp = [[INF]*(n) for i in range(n)]

for i in range(n):#一つの行列部分にゼロを入れる
    dp[i][i] = 0

for l in range(1,n):
    for i in range(n-l):
        j = i + l
        dp[i][j] = INF
        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][n-1])

Python: n = int(input())
rc = [[0, 0]]+[list(map(int, input().split())) for i in range(n)]
m = [[0]*(n+1) for _ in range(n+1)]

for l in range(2, n+1):
    for i in range(1, n-l+2):
        j = i+l-1
        m[i][j] = 2**64
        for k in range(i, j):
            m[i][j] = min([
                m[i][j],
                m[i][k]+m[k+1][j]+rc[i][0]*rc[k+1][0]*rc[j][1]
            ])
print(m[1][n])