【每日一题(17)】Where is the Marble? UVA

Where is the Marble? UVA - 10474

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 begins
with 2 integers: N the number of marbles and Q the number of queries Mina would make. The next
N 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 numbers
are 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 whether
or not the query number is written upon any of the marbles. The two different formats are described
below:
• ‘x found at y’, if the first marble with number x was found at position y. Positions are numbered
1, 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

题意

题目不难理解，就是排序然后输出某一个大理石的位置，用STL可以解决，或者数组也行，都是一样的，这道题WA了3次T_T，第一次数组越界，第二次还是数组越界，第三次多了个空格输出格式错误T_T

题解

#include<iostream>#include<vector>#include<algorithm>using namespace std;int main(){  int a,b,cnt = 1;  while(cin >> a >> b){    vector<int>vec;    if(a == 0 && b == 0)      break;    while(a--){      int t;      cin >> t;      vec.push_back(t);    }    cout << "CASE# " << cnt << ":" << endl;    sort(vec.begin(),vec.begin() + vec.size());    while(b--){      int t;      cin >> t;      int p = lower_bound(vec.begin(),vec.begin() + vec.size(),t)  - vec.begin();      if(vec[p] == t)          cout << t << " found at " << p + 1 << endl;      else          cout << t << " not found" << endl;    }    cnt++;  }  return 0;}