Uva10474.where is the marble?

Question link: http://uva.onlinejudge.org/index.php? Option = com_onlinejudge & Itemid = 8 & page = show_problem & problem = 1415

 

13887483	10474	Where is the marble?	Accepted	C ++	0.548	2014-07-15 15:34:47
13887433	10474	Where is the marble?	Wrong answer	C ++	0.572	2014-07-15 15:27:44

 

 

Where is the marble?

Raju and Meena love to play with marbles. they have got a lot of marbles with numbers written on them. at the beginning, Raju wowould place the marbles one after another in ascending order of the numbers written on them. then Meena wocould ask Raju to find the first marble with a certain number. she wocould 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:NThe number of marbles andQThe number of queries Mina wocould make. The nextNLines wocould contain the numbers written onNMarbles. These marble numbers will not come in any special order. FollowingQLines will haveQQueries. Be assured, none of the input numbers are greater than 10000 and none of them are negative.

Input is terminated by a test case whereN= 0 andQ= 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:

 

• `XFoundY', If the first marble with numberXWas found at positionY. Positions are numbered 1, 2 ,...,N.
• `XNot found', If the marble with numberXIs not present.

Look at the output for sample input for details.

 

Sample Input

4 1235155 213331230 0

 

Sample output

CASE# 1:5 found at 4CASE# 2:2 not found3 found at 3

Solution: after sorting, you must remember to query the lower limit in binary mode. I started to try to write two points on my own. The result is wa.

 1 #include <cstring> 2 #include <cstdlib> 3 #include <cstdio> 4 #include <iostream> 5 #include <cmath> 6 #include <cctype> 7 #include <set> 8 #include <vector> 9 #include <algorithm>10 #include <numeric>11 using namespace std;12 13 /*int bsearch (vector<int> &a, int x, int y, int v) {14     int m;15     while (x < y) {16         m = x + (y - x) / 2;17         if (a[m] == v) return m;18         else if(a[m] > v) y = m;19         else x = m + 1;20     }21     return -1;22 }*/23 24 int main () {25     int stone_n, ask_n, find_stone, cnt = 0;26     while (cin >> stone_n >> ask_n) {27         if (stone_n + ask_n == 0) {28             break;29         }30         int stone_bag[10005];31         for (int i = 0; i < stone_n; ++ i)  {32             int x; cin >> stone_bag[i];33         }34         sort(stone_bag, stone_bag + stone_n);35         printf("CASE# %d:\n", ++ cnt);36         while (ask_n --) {37             cin >> find_stone;38             //int res = bsearch(stone_bag, 0, stone_n, find_stone);39             //cout << res << endl;40             int res = lower_bound(stone_bag, stone_bag + stone_n, find_stone) - stone_bag;41             if (stone_bag[res] == find_stone) {42                 cout << find_stone << " found at " << res + 1 << endl;43             } else {44                 cout << find_stone << " not found" << endl;45             }46         }47     }48 49     return 0;50 }