HDU4283You Are the One区间dp, 记忆话搜索运行时间: #include <iostream> #include <cstdio> #include <cstring> using namespace std; const int maxn = 105,inf = 1<<30; int dp[maxn][maxn][maxn],arr[maxn],n; int solve(int s,int e,int k){ if( s == e…
Treats for the Cows Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7949 Accepted: 4217 Description FJ has purchased N (1 <= N <= 2000) yummy treats for the cows who get money for giving vast amounts of milk. FJ sells one treat per da…
ID Origin Title 17 / 60 Problem A ZOJ 3537 Cake 54 / 105 Problem B LightOJ 1422 Halloween Costumes 59 / 90 Problem C POJ 2955 Brackets 26 / 51 Problem D CodeForces 149D Coloring Brackets 47 / 58 Problem E POJ 1651 Multiplication Puz…
区间类动态规划 一.基本概念 区间类动态规划是线性动态规划的拓展,它在分阶段划分问题时,与阶段中元素出现的顺序和由前一阶段的那些元素合并而来由很大的关系.例如状态f [ i ][ j ],它表示以已合并的次数为阶段,以区间的左端点 i 为状态,它的值取决于第 i 个元素和第 j 个元素断开的位置 k,即 f [ i ][ k ] + f [ k+1 ][ j ]的值.这一类型的动态规划,阶段特征非常明显,求最优值时需要预先设置阶段内的区间统计值,还要以动态规划的起始位置来判断. 区间类动态规划…