## Search found 6 matches

Thu Oct 09, 2003 6:45 pm
Forum: Volume 1 (100-199)
Topic: 113 - Power of Cryptography
Replies: 163
Views: 17939
Ok I'm sorry but I'm still having some problems understanding that formula. i think i understand it now to mean a log(a) b = log(a) b / log(a) a where the a in parenthesis means log(base a) of. PS: a in a log b is the base of the log so using natural logs, it seems that the formula would be e ln b =...
Thu Oct 09, 2003 3:46 am
Forum: Volume 1 (100-199)
Topic: 113 - Power of Cryptography
Replies: 163
Views: 17939
Try the formula: a log b = log b / log a Maybe my math skills are a little rusty, but I thought the formula was a log b = log (b^a) :wink: and for the compiler warnings (Visual C++ doesn't have any problem with that,) the problem statement guarantees k to be less than 1E9. i used double for the pre...
Mon Oct 06, 2003 9:01 pm
Forum: Volume 1 (100-199)
Topic: 113 - Power of Cryptography
Replies: 163
Views: 17939

### another 113 problem

This program is a one-liner for the most part, but the judge keeps giving me wrong answer with this code. I've tested it with other inputs and get correct outputs. what am i doing wrong? [cpp] long k; short n; double p; while(cin >> n >> p) { if(p==1) { cout << 1 << endl; continue;} if(n==1) { cout ...
Mon Oct 06, 2003 4:36 am
Forum: Volume 1 (100-199)
Topic: 107 - The Cat in the Hat
Replies: 278
Views: 22781
There is an analytic solution of sorts, although i have no idea of it's efficiency. if you express the two equations with natural logs, you'll get an equation of the form N^c - N -1 = 0, where N is the number of cats in each hat and c is the ratio of the natural logs of the two input constants. You ...
Tue Sep 16, 2003 9:48 pm
Forum: Volume 1 (100-199)
Topic: 144 - Student Grants
Replies: 21
Views: 3817

### Problem 144 -- Recycling the Source

When filling a student's grant completely, doesn't empty the output store, how many coins will the reserve spit out when the store does empty? For example: Student 1 has \$39. The machine store has \$2. Filling student 1's grant leaves \$1 in the output store. Student 2 gets the \$1 from the store. Now,...
Mon Sep 15, 2003 3:38 am
Forum: Volume 1 (100-199)
Topic: 100 - The 3n + 1 problem
Replies: 1394
Views: 193421

### Problems 100, 118 -- terminating standard input, C++

I don't know an elegant way to control a loop based on reaching the end-of-file of the standard input. I think this is the reason I got consistent WA's on problem 100, so I gave up until the same thing comes up on 118. For 100 i was doing int firstnum, lastnum; while( cin>>firstnum>>lastnum) :evil: ...