大理石在哪

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我是靠谱客的博主深情春天，最近开发中收集的这篇文章主要介绍大理石在哪，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

Raju and Meena love to play with Marbles. They have got a lot of

marbles with numbers written on them. At the beginning, Raju would

place the marbles one after another in ascending order of the numbers

written on them. Then Meena would ask Raju to find the first marble

with a certain number. She would count 1...2...3. Raju gets one point

for correct answer, and Meena gets the point if Raju fails. After some

fixed number of trials the game ends and the player with maximum

points wins. Today it’s your chance to play as Raju. Being the smart

kid, you’d be taking the favor of a computer. But don’t underestimate

Meena, she had written a program to keep track how much time you’re

taking to give all the answers. So now you have to write a program,

which will help you in your role as Raju.

Input

There can be multiple test cases. Total no of test cases is less than 65.

Each test case consists beginswith 2 integers: N the number of marbles

and Q the number of queries Mina would make. The nextN lines would contain

the numbers written on the N marbles. These marble numbers will not come

in any particular order. Following Q lines will have Q queries. Be assured,

none of the input numbersare greater than 10000 and none of them are negative.

Input is terminated by a test case where N = 0 and Q = 0.

Output

For each test case output the serial number of the case.

For each of the queries, print one line of output. The format of this line will

depend upon whetheror not the query number is written upon any of the marbles.

The two different formats are described below:

? ‘x found at y’, if the firstmarble with number x was found at position y.

Positions are numbered1, 2, . . . , N.

? ‘x not found’, if the marble with number x is not present.

Look at the output for sample input for details.

Sample Input

4 1
2
3
5
1
5
5 2
1
3
3
3
1
2
3
0 0

Sample Output
CASE# 1:
5 found at 4
CASE# 2:
2 not found

3 found at 3

#include<iostream>
#include<algorithm>
using namespace std;
const int maxn = 10000;
int main()
{
	int n, q, x, a[maxn], kase = 0;
	while (scanf("%d%d", &n, &q) == 2 && n!=0&&q!=0)
	{
		printf("CASE# %d:n", ++kase);
		for (int i = 0; i < n; i++)
			scanf("%d", &a[i]);
		sort(a, a + n);
		while (q--)
		{
			scanf("%d", &x);
			int p= lower_bound(a, a + n, x) - a;//再已排序数组a中寻找x
			if (a[p] == x) printf("%d found at %dn", x, p + 1);
			else printf("%d not foundn", x);
		}
	}
	return 0;
}

题解：有n个大理石，每个大理石上写了一个非负整数。首先把各数从小到大排序，然后回答Q个问题。

每个问题问是否有一个大理石写着某个整数x，如果是，还要回答哪个大理石上写着x。排序后大理石

从做到右编号为1-n