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洛谷练习
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洛谷：P3405：Cities and States S
Posted on 30th Jan 2026
Table of Contents 题目 分析 答案 ...
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USACO历年真题
洛谷练习
数学谜题
Bat and Ball
No Twins Today
Portrait
Half Grown
Shoes, Socks and Gloves
Phone Call
Powers of Two
Rotating Coin
Boxing the Mountain State
Martians in a Circle
Winning at Wimbledon
Polyhedron Faces
Finding the Counterfeit
Signs in an Array
Birthday Match
Meeting the Ferry
Sinking 15
Monk on a Mountain
Mathmatical Bookworm
Other Side of the Coin
Slicing the Cube
Rolling Pencil
Watermelons
Boy Born on Tuesday
Air Routes in Aerostan
Tipping the Scales
Chomp
Whose Bullet
Poker Quickie
Lines Through a Grid
Bidding in the Dark
Easy Cake Division
Crossing the River
Bacterial Reproduction
Sprinklers in a field
Bags of Marbles
Men with Sisters
Dots and Boxes Variation
Fair Play
Salaries and Raises
Two Runners
Broken ATM
Domino Task
Big Pairs in a Matrix
Second Ace
Fewest Slopes
Three Martians at the Crossroads
Rolling All the Numbers
Uniform Unit Distances
Life Is a Bowl of Cherries
Finding the Missing Number
Three Way Duel
Splitting a Hexagon
Expecting the Worst
Belt Around the Earth
Stopping after the Boy
Attic Lamp
Efficient Pizza-cutting
Fourth Corner
Cutting the Necklace
Odd Run of Heads
Subsets with Constraints
Spinning Switches
Watches on the Table
Bugging a Disk
Points on a Circle
Two Different Distances
Same Sum Subsets
Players and Winners
Spaghetti Loops
Playground
Typography
