## lightoj1020

maksyuki 发表于 oj 分类，标签:

1020 - A Childhood Game

Both Alice and Bob know the number of marbles initially. Now the game can be started by any one. But the winning condition depends on the player who starts it. If Alice starts first, then the player who takes the last marble >>继续阅读

## lightoj1019

maksyuki 发表于 oj 分类，标签:

1019 - Brush (V)

The city they live in is divided by some junctions. The junctions are connected by two way roads. They live in different junctions. And they can go to one junction to other by using the roads only.Tanvir returned home from the cont >>继续阅读

## lightoj1016

maksyuki 发表于 oj 分类，标签:

1016 - Brush (II)

You can assume that the rope is sufficiently large. Now Samee wants to clean the room with minimum number of moves. Since he already had a contest, his head is messy. So, help him.After the long contest, Samee returned home and go >>继续阅读

## lightoj1014

maksyuki 发表于 oj 分类，标签:

1014 - Ifter Party

Now you have to find the number of piaju's each contestant ate.I have an Ifter party at the 5th day of Ramadan for the contestants. For this reason I have invited C contestants and arranged P piaju's (some kind of food, specially >>继续阅读

## lightoj1012

maksyuki 发表于 oj 分类，标签:

1012 - Guilty Prince

For simplicity, you can consider the place as a rectangular grid consisting of some cells. A cell can be a land or can contain water. Each time the prince can move to a new cell from his current position if they share a side.On >>继续阅读

## lightoj1010

maksyuki 发表于 oj 分类，标签:

1010 - Knights in Chessboard

Those who are not familiar with chess knights, note that a chess knight can attack 8 positions in the board as shown in the picture below.Given an m x n chessboard where you want to place chess knights. You have to find >>继续阅读

## lightoj1008

maksyuki 发表于 oj 分类，标签:

1008 - Fibsieve`s Fantabulous Birthday

Among these gifts there was an N x N glass chessboard that had a light in each of its cells. When the board was turned on a distinct cell would light up every second, and then go dark.Fibsieve had a fantabulou >>继续阅读

## lightoj1007

maksyuki 发表于 oj 分类，标签:

1007 - Mathematically Hard

In this problem, you will be given two integers a and b. You have to find the summation of the scores of the numbers from a to b (inclusive). The score of a number is defined as the following function.Mathematically some >>继续阅读

## lightoj1002

maksyuki 发表于 oj 分类，标签:

For example, in the above picture, if we want to go from 0 to 4, then we can chooseI am going to my home. There are many cities and many bi-directional roads between them. The cities are numbered from 0 to n-1 and each road has >>继续阅读

## bzoj3229

maksyuki 发表于 oj 分类，标签:

## bzoj2818

maksyuki 发表于 oj 分类，标签:

## bzoj2705

maksyuki 发表于 oj 分类，标签:

## Description

Longge的数学成绩非常好，并且他非常乐于挑战高难度的数学问题。现在问题来了：给定一个整数N，你需要求出∑gcd(i, N)(1<=i <=N)。

## bzoj2190

maksyuki 发表于 oj 分类，标签:

## sgu112

maksyuki 发表于 oj 分类，标签:

ab-ba

You are given natural numbers a and b. Find ab-ba.

Input

Input contains numbers a and b (1≤a,b≤100).

## sgu105

maksyuki 发表于 oj 分类，标签:

Div 3

There is sequence 1, 12, 123, 1234, ..., 12345678910, ... . Given first N elements of that sequence. You must determine amount of numbers in it that are divisible by 3.

Input

Input contains N (1<=N<=231 - 1).

Output

Write >>继续阅读

## sgu104

maksyuki 发表于 oj 分类，标签:

Little shop of flowers

PROBLEM

You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto >>继续阅读