经典问题没啥说的
#include<stdio.h>
#include<string.h>
#define max 100+1
#define min(a,b) (a<b?a:b)
typedef long long LL;
LL dp[max][max];
int p[max];
int main(){
int n;
while(~scanf("%d",&n)){
int i,j,k,l;
for(i=1;i<=n;i++){
scanf("%d%d",&p[i-1],&p[i]);
dp[i][i]=0;
}
for(l=2;l<=n;l++){
for(i=1;i+l-1<=n;i++){
j=i+l-1;
LL& tmp=dp[i][j];
tmp=999999999;
for(k=i;k<j;k++){
tmp=min(dp[i][k]+dp[k+1][j]+p[i-1]*p[k]*p[j],tmp);
}
}
}
printf("%lld
",dp[1][n]);
}
}