在Java的 Map 中，如果要在循环中删除元素，需要使用 Iterator 来遍历和删除元素，而不是使用普通的 for 循环遍历。这是因为在使用普通的 for...

"I will tell you an odd number N, and then N integers. There will be a special i...

Now tell you two nonnegative integer a and b. Find the nonnegative integer X and...

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Ot...

Given two integers, a and b, you should check whethera is divisible by b or not....

If an integer is not divisible by 2 or 5, some multiple of that number in decima...

Consider positive integers a, a + 1, ..., b (a ≤ b). You want to find the minimu...

Two soldiers are playing a game. At the beginning first of them chooses a posit...

Farmer John wants to repair a small length of the fence around the pasture. He m...

In how many ways can you tile a 2xn rectangle by 2x1 or 2x2 tiles? Here i...

There is a single positive integer T on the first line of input. It stands for t...

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Oth...

For each command "OUT", you should output a integer depend on the word is "FIFO"...

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Othe...

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Oth...

But having attended several classes of the club, Petya realized that not all tas...

Vasya likes everything infinite. Now he is studying the properties of a sequenc...

The input consists of lines each containing an integer meaning an amount to be p...

Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Ot...

Pasha has a wooden stick of some positive integer length n. He wants to perform ...