Homework Introduction

明确可以划分的阶段，找出动态转移方程

Problem

Problem
P1258   数字金字塔
P1264   合唱队形
P1260   拦截导弹(Noip1999)
P1261   城市交通路网
P1262   挖地雷
P1263   友好城市
Status
Done
Problem
6
Open Since
2025-12-14 0:00
Deadline
2025-12-29 23:59
Extension
24 hour(s)
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