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 (r Range) length() int {
	return r.end - r.start + 1
}

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[r.start].r, matrices[r.end].c}, v
	}
	if r.length() == 0 {
		panic("must not be empty")
	} else if r.length() == 1 {
		return matrices[r.start], 0
	}

	var minCount int = math.MaxInt32

	for i := 0; i < r.length()-1; i++ {
		formerRange := Range{r.start, r.start + i}
		latterRange := Range{r.start + i + 1, r.end}
		matF, countF := calcMinMatrixChainMultiplication(matrices, formerRange, memo)
		matL, countL := calcMinMatrixChainMultiplication(matrices, latterRange, memo)
		_, countFL := calcMultiplication(matF, matL)
		count := countF + countL + countFL
		if count < minCount {
			minCount = count
		}
	}
	memo[r] = minCount
	return Matrix{matrices[r.start].r, matrices[r.end].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())
rc = [list(map(int, input().split())) for _ in range(N)]

DP = [[(0, -1, -1)]*(N) for _ in range(N)]
DP[0] = [(0, r, c) for r, c in rc]

for i in range(1, N):
    for j in range(N-i):
        lis = []
        for k in range(i):
            s, r, c = DP[k][j]
            s2, r2, c2 = DP[i-k-1][j+k+1]
            lis.append((r*c*c2+s+s2, r, c2))
        DP[i][j] = min(lis)
print(DP[-1][0][0])

Python: def calc(p):
    n = len(p) - 1
    m = [[None for i in range(n + 1)] for j in range(n + 1)]
    for x in range(n):
        m[x][x] = 0
    for l in range(2, n + 1):
        for i in range(0, n - l + 1):
            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])
    return m

n = int(input())
p = []
for i in range(n):
    inp = list(map(int, input().split()))
    if i == 0:
        p.append(inp[0])
        p.append(inp[1])
    elif 0 < i < n - 1:
        p.append(inp[1])
    elif i == (n - 1):
        p.append(inp[1])

m = calc(p)
print(m[0][n - 1])

Python: import sys, copy

num = int(sys.stdin.readline())

if num==1:
    print(0)
    quit()
    
mm = list(map(int, sys.stdin.readline().split()))
for _ in range(num-1):
    mm.append(int(sys.stdin.readline().split()[1]))

used = [False] * num
seq = [0] * (num-2)
minv = 0
j=mm[1]
for i in mm[2:]:
    minv += i*j
    j=i
minv *= mm[0]    

def sequence(n, k, m, t):
    global minv, used, seq
    if k==m:
        t += mm[0]*mm[used[1:].index(False)+1]*mm[num]
        if minv>t:    minv = t
    else:
        for i in range(1,n+1):
            if used[i]: continue
            seq[m] = i
            used[i]=True

            l=i-1
            while l>0 and used[l]:     l-=1
            u=i+1
            while u<num and used[u]:   u+=1
            v = mm[l]*mm[i]*mm[u]
            if minv>t+v: sequence(n, k, m+1, t+v)
            used[i]=False

sequence(num-1, num-2, 0, 0)

print(minv)

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

ans = [[None for i in range(n)] for j in range(n)]


# for文で動的計画法
def dp1(i, j):
    if ans[i][j] is not None:
        return ans[i][j]
    else:
        if i == j:
            ans[i][j] = 0
        else:
            ret = float('INF')
            for k in range(i, j):
                tmp = dp1(i, k) + A[i][0]*A[k][1]*A[j][1] + dp1(k+1, j)
                ret = min(ret, tmp)
            ans[i][j] = ret
        return ans[i][j]


print(dp1(0, n-1))

Python: INF = float('inf')
mm = [(-1,-1)]
n = int(input())
for _ in range(n):
    mm.append(tuple((map(int,input().split()))))

def scala(a,b,c):
    return mm[a][0] * mm[b][1] * mm[c][1] 

dp = [[INF for _ in range(n+1)] for _ in range(n+1)]
#init
for i in range(1,n):
    dp[i][i+1] = mm[i][0] * mm[i+1][1] * mm[i][1]
    dp[i][i] = 0
dp[-1][-1] = 0
#begin dp
for d in range(2,n):
    for l in range(1,n-d+1):
        r = l + d
        for m in range(l,r):
            dp[l][r] = min(dp[l][m] + dp[m+1][r] + scala(l,r,m), dp[l][r])
print(dp[1][n])
#for i in range(n+1):
#    print(dp[i])
#for d in range(2,n):
#    for l in range(1,n-d+1):
#        r = l + d
#        for m in range(l,r):
#            dp[l][r] = max(dp[l][m] + dp[m+1][r] + scala(l,r,m), dp[l][r])

#print(dp[1][n])
#for i in range(n+1):
#    print(dp[i])

Python: INF = 10**10


def rec(l:int, r:int) -> int:
    if dp[l][r] != INF:
        return dp[l][r]
    elif r - l == 1:
        dp[l][r] = 0
        return 0
    elif r - l == 2:
        dp[l][r] = M[l][0] * M[l][1] * M[l+1][1]
        return dp[l][r]
    else:
        for i in range(l+1, r):
            dp[l][r] = min(dp[l][r], rec(l, i) + rec(i, r) + M[l][0] * M[i-1][1] * M[r-1][1])
    return dp[l][r]


if __name__ == "__main__":
    N = int(input())
    M = [tuple(map(int, input().split())) for _ in range(N)]
    dp = [[INF]*(N+1) for _ in range(N+1)]
    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 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=[]
for i in range(n):
    M.append(list(map(int,input().split())))

dp=[[0]*n for i in range(n)]

def mincost(x,y):
    if dp[x][y]>0:
        return dp[x][y]
    elif x>=y:
        return dp[x][y]
    else:
        res=float('inf')
        for k in range(x,y):
            temp=mincost(x,k)+mincost(k+1,y)+M[x][0]*M[k][1]*M[y][1]
            res=min(res,temp)
        dp[x][y]=res
        return dp[x][y]

print(mincost(0,n-1))

Python: n = int(input())

M= [[] for i in range(n)]

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

p = [M[0][0]]

for i in range(n):
  p.append(M[i][1])

f_inf = float("inf")

m = [[f_inf for i in range(n)] for j in range(n)]

def matrixChainOrder(n):
  for i in range(n):
    m[i][i] = 0
  for l in range(2, n+1):
    for i in range(n-l+1):
      j = i + l - 1
      for k in range(i, j):
        q = m[i][k] + m[k+1][j] + p[i]*p[k+1]*p[j+1]
        if q < m[i][j]:
          m[i][j] = q

matrixChainOrder(n)

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

Python: import sys

p=[0 for i in range (101)]
m=[[0 for i in range(100)]for i in range(100)]

def MatrixChain(n) : 
	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
			m[i][j] = float('Infinity')
			for k in range(i,j) :
				q = m[i][k] + m[k+1][j] + p[i-1]*p[k]*p[j]
				m[i][j] = m[i][j] if m[i][j] <= q else q

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

MatrixChain(n)
print(m[1][n])

Python: INF = float("inf")
n = int(input())
z = []
m = [[0] * (n + 1) for _ in range(n + 1)]
for i in range(1, n + 1):
    a, b = map(int, input().split())
    z.append(a)
z.append(b)
for l in range(1, n):
    for i in range(1, n - l + 1):
        j = i + l
        m[i][j] = INF
        for k in range(i, j):
            m[i][j] = min(m[i][j], m[i][k] + m[k + 1][j] + z[i - 1] * z[k] * z[j])
print(m[1][n])