直接套用DAG的思路就行. AC代码: #include<cstdio> #include<cstring> #include<algorithm> using namespace std; const int INF=1<<30; const int maxn=50; int dp[maxn][3]; int G[maxn][3][maxn][3]; struct node{ int a[3],b[3],c[3]; node(){} node(int x,…
上一次紫芝详细地介绍了动态规划中的经典问题LIS,今天我们抽出一个类似思想的简单题目进行实践练习. The Tower of Babylon(巴比伦塔) Perhaps you have heard of the legend of the Tower of Babylon. Nowadays many details of this tale have been forgotten. So now, in line with the educational nature of this con…
https://odzkskevi.qnssl.com/5e1fdf8cae5d11a8f572bae96d6095c0?v=1507521965 Perhaps you have heard of the legend of the Tower of Babylon. Nowadays many details of this tale have been forgotten. So now, in line with the educational nature of this contes…
C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city, numbe…