Go: package main

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

//util
var sc = bufio.NewScanner(os.Stdin)

func nextStr() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func printList(list []int) {
	buf := bufio.NewWriter(os.Stdout)
	for _, v := range list {
		buf.Write([]byte(fmt.Sprintf(" %d", v)))
	}
	buf.Write([]byte("\n"))
	buf.Flush()
}

//solve
//単純な場合
func matrixChainMultiplication() {
	//行列が1つだけのとき
	for i := 1; i <= n; i++ {
		m[i][i] = 0
	}
	for l := 2; l <= n; l++ {
		for i := 1; i <= n-l+1; i++ {
			j := i + l - 1
			m[i][j] = 1 << 21
			//kまでで区切る
			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])
			}
		}
	}
}

func max(a, b int) int {
	if a > b {
		return a
	} else {
		return b
	}
}

func min(a, b int) int {
	if a > b {
		return b
	} else {
		return a
	}
}

const MAX = 100

var n int
var p [MAX + 1]int

//m[i][j]: Mi * Mi+1 * ... * Mjを計算するときに必要なスカラー乗算の最小回数
var m [MAX + 1][MAX + 1]int

func main() {
	sc.Split(bufio.ScanWords)
	n = nextInt()
	for i := 1; i <= n; i++ {

		p[i-1] = nextInt() //行数
		p[i] = nextInt()   //列数
	}

	matrixChainMultiplication()
	fmt.Println(m[1][n])
}

Python: def matrix_chain_order(p):
    n = len(p)
    m = {}
    for length in range(1, n + 1):
        for i in range(n - length + 1):
            j = i + length - 1
            if i == j:
                m[(i, j)] = 0
            else:
                q = None
                for k in range(i, j):
                    c = m[(i, k)] + m[(k+1, j)] + p[i][0] * p[k][1] * p[j][1]
                    if q is None or c < q:
                        q = c
                m[(i, j)] = q
    return m[(0, n-1)]

if __name__ == '__main__':
    import sys

    p = []
    n = int(input())
    for _ in range(n):
        p.append(tuple(map(int, sys.stdin.readline().split())))
    print(matrix_chain_order(p))

Python: n = int(input())
INF = 10**9
P = [list(map(int, input().split())) for i in range(n)]
m = [[0]*n for i in range(n)]

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

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

Python: n = int(input())
INF = 10**9
P = []
for i in range(n):
    p = map(int, input().split())
    P.append()
m = [[0]*n for i in range(n)]

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

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

Python: import sys
n=int(input())+1
e=list(map(lambda x:x.split(),sys.stdin))
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: inf = 10**9+7
mod = 10**9+7
n = int(input())
rc = [list(map(int, input().split())) for i in range(n)]
dp = [[inf for j in range(n)]for i in range(n)]
for i in range(n):
    dp[i][i] = 0
for k in range(1,n):
    for i in range(0,n-k):
        for j in range(k):
            dp[i][i+k] = min(dp[i][i+k], dp[i][i+j] + dp[i+j+1][i+k] + rc[i][0]*rc[i+j][1]*rc[i+k][1])
print(dp[0][n-1])

Python: def matrix_chain_multiplication(n):
    m = [[0 for x in range(n+1)] for y 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] = float('inf')
            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])

p = []
n = int(input())

for i in range(n):
    listed_input = input().split()
    p.append(int(listed_input[0]))

p.append(int(listed_input[1]))

matrix_chain_multiplication(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: import sys


input = sys.stdin.readline
n = int(input())
m_list = []
for _ in range(n):
    m_list.append(list(map(int, input().split())))

p_list = [m_list[0][0]]
for i in range(n):
    p_list.append(m_list[i][1])

m = [[10**9]*(n+1) for i in range(n+1)]

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

print(m[1][n])

Python: # coding: utf-8
# Your code here!
INF = 2000000000

def matrixChainMultiplication(m):
    global n
    for l in range(2, n+1):
        for i in range(1, n-l + 2):
            j = i + l - 1
            m[i][j] = INF
            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])
    return m
 
    
n = int(input())

m = [[0 for i in range(n + 1)] for j in range(n + 1)]
p = []


for i in range(n):
    input_command = input()
    num1,num2 = input_command.split()
    p.append(int(num1))
    if i == n-1:
        p.append(int(num2))
        
m = matrixChainMultiplication(m)
print(m[1][n])

Python: n = int(input())
p = []
a,b = [int(x) for x in input().split()]
p.append(a)
p.append(b)
for i in range(1, n):
    c,d = [int(x) for x in input().split()]
    p.append(d)
# end input
# create dp table
dp = []
for x in range(n+1):
    dp.append([0] * (n+1))

for l in range(2, n+1):
    for i in range(1, n-l+2):
        j = i + l -1
        dp[i][j] = 9999999999

        for k in range(i, j):
            tmp = dp[i][k] + dp[k+1][j] + (p[i-1] * p[k] * p[j])
            if dp[i][j] > tmp:
                dp[i][j] = tmp
#print(dp)
print(dp[1][n])

Python: import functools


@functools.lru_cache(maxsize=None)
def rec(l, r):
    # [l, r)
    if l+1 == r:
        return 0
    ret = INF
    for mid in range(l+1, r):
        ret = min(ret, rec(l, mid) + rec(mid, r) + R[l] * R[mid] * C[r-1])
    return ret

INF = 10**9
N = int(input())
R, C = [], []
for i in range(N):
    r, c = map(int, input().split())
    R.append(r), C.append(c)
print(rec(0, 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: def divide_list(l):
    divided_list = [[None, None] for _ in range(len(l) - 1)]
    for i, dl in enumerate(divided_list):
        dl[0], dl[1] = l[0:(i+1)], l[(i+1):]
    return divided_list


def mat_chain_mult(idx_list):
    global a
    global c

    start, end = idx_list[0], idx_list[-1]


    if c[start][end] is not None:
        return c[start][end]

    if len(idx_list) == 1:
        c[start][end] = 0
    elif len(idx_list) == 2:        
        c[start][end] = a[start] * a[start+1] * a[start+2]
    else:
        divided_list = divide_list(idx_list)
        cc = a[start] * a[end+1]
        
        c[start][end] = min([mat_chain_mult(dl0) + mat_chain_mult(dl1) + cc * a[len(dl0) + start] for dl0, dl1 in divided_list])
    
    return c[start][end]
    

if __name__ == "__main__":
    n = int(input())
    a = [0] * (n + 1)
    c = [[None] * n for _ in range(n)]

    for i in range(n-1):
        a[i] = list(map(int, input().split()))[0]
    a[n-1], a[n] = list(map(int, input().split()))

    print(mat_chain_mult(list(range(n))))