Saturday, October 30, 2010


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The Seven Percent Solution

Time Limit: 1000MSMemory Limit: 65536K
Total Submissions: 5293Accepted: 3475


Uniform Resource Identifiers (or URIs) are strings like,,, or even just readme.txt that are used to identify a resource, usually on the Internet or a local computer. Certain characters are reserved within URIs, and if a reserved character is part of an identifier then it must be percent-encoded by replacing it with a percent sign followed by two hexadecimal digits representing the ASCII code of the character. A table of seven reserved characters and their encodings is shown below. Your job is to write a program that can percent-encode a string of characters.

" " (space)%20
"!" (exclamation point)%21
"$" (dollar sign)%24
"%" (percent sign)%25
"(" (left parenthesis)%28
")" (right parenthesis)%29
"*" (asterisk)%2a


The input consists of one or more strings, each 1–79 characters long and on a line by itself, followed by a line containing only "#" that signals the end of the input. The character "#" is used only as an end-of-input marker and will not appear anywhere else in the input. A string may contain spaces, but not at the beginning or end of the string, and there will never be two or more consecutive spaces.


For each input string, replace every occurrence of a reserved character in the table above by its percent-encoding, exactly as shown, and output the resulting string on a line by itself. Note that the percent-encoding for an asterisk is %2a (with a lowercase "a") rather than %2A (with an uppercase "A").

Sample Input
Happy Joy Joy!
the 7% solution

Sample Output

Mid-Central USA 2007


Source Code:

[sourcecode language="cpp" collapse="true" padlinenumbers="true"]
//Tue Apr 20 11:49:19 CDT 2010
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>

using namespace std;

int main( int argc, const char* argv[] )
// freopen("", "r", stdin);
// freopen("output.out", "w", stdout);
string str;
while(getline(cin ,str) && str != "#")
for(int i=0; i<str.size(); i++)
if(str[i] == ' ') cout << "%20";
else if(str[i] == '!') cout << "%21";
else if(str[i] == '$') cout << "%24";
else if(str[i] == '%') cout << "%25";
else if(str[i] == '(') cout << "%28";
else if(str[i] == ')') cout << "%29";
else if(str[i] == '*') cout << "%2a";
else cout << str[i];
cout << endl;
// fclose(stdin);
// fclose(stdout);
return 0;

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